Browsing by Author "Santonen, Tiina"
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- Biomonitoring as an underused exposure assessment tool in occupational safety and health context: challenges and way forwardPublication . Viegas, Susana; Jeddi, Maryam Zare; Hopf, Nancy B.; Bessems, Jos; Palmen, Nicole; Galea, Karen S.; Jones, Kate; Kujath, Peter; Duca, Radu-Corneliu; Verhagen, Hans; Santonen, Tiina; Pasanen-Kase, RobertRecent advances in analytical chemistry have allowed a greater possibility of using quantitative approaches for measuring human exposure to chemicals. One of these approaches is biomonitoring (BM), which provides unequivocal evidence that both exposure and uptake of a chemical have taken place. BM has been a longstanding practice in occupational health for several reasons. BM integrates exposure from all routes. It can help identify unintentional and unexpected exposures and assess the effectiveness of existing risk-management measures. BM also provides relevant information to support policy development by delivering better evidence of workers' exposure to chemical substances, even within the framework of the present regulations. Thus, BM can allow for both the evaluation of the impact of regulation and the identification of further needs for new or improved regulation. However, despite all these well-recognized advantages, BM is currently an underused exposure assessment tool. This paper provides an overview of the key aspects to be considered when using BM in the context of occupational health interventions. Additionally, this paper describes the potential of BM as an exposure assessment tool, distinguishing the role of BM in exposure assessment and health surveillance and clarifies ethical and communication aspects to guarantee that general data protection regulations are followed. In addition, actions and research needs are identified (particularly with reference to the European situation), which aim to encourage the increased use of BM as an exposure assessment tool.
- Biomonitoring of occupational exposure to bisphenol A, bisphenol S and bisphenol F: a systematic reviewPublication . Bousoumah, Radia; Leso, Veruscka; Iavicoli, Ivo; Huuskonen, Pasi; Viegas, Susana; Porras, Simo P.; Santonen, Tiina; Frery, Nadine; Robert, Alain; Ndaw, SophieBisphenol A (BPA) and its substitutes bisphenol S (BPS) and bisphenol F (BPF) are endocrine disrupting chemicals widely used in the production of polycarbonate plastics, epoxy resins and thermal papers. The aim of the review was to identify occupational studies using human biomonitoring (HBM) as a tool for bisphenol exposure assessment and to characterize research gaps on the topic as part of the HBM4EU project. Hence, a systematic literature search using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) methodology was conducted for articles published between 2000 and 27th March 2020 across three databases (PubMed, Scopus and Web of Science). Thirty studies on the occupational HBM of BPA met the inclusion criteria. Regarding BPS and BPF, only 4 and 2 publications were retrieved, respectively. Fifty-seven percent (57%) of the studies selected for BPA were conducted in Asia whereas half of BPS and BPF studies were undertaken in Europe. Studies on BPA in plastic and epoxy resin sectors were infrequent in Europe while Asian data showed higher exposure when the substance is employed as raw material. The main data on BPS were among cashiers while BPF data were available from incinerator workers. Several research gaps have been identified: (i) shortage of HBM studies on occupational exposure, especially to BPS and BPF; (ii) different methodological designs making suitable comparisons between studies difficult; and (iii) only few studies conducted on the industrial applications of bisphenols outside Asia. This review highlights the lack of recent occupational HBM studies on bisphenols and the need for a harmonized approach to acquire reliable data. Considering the increasing replacement of BPA by BPS and BPF, it is of relevance to evaluate the exposure to these substances and the impact of the available risk management measures on workers exposure and possible health risk.
- Biomonitoring of occupational exposure to phthalates: a systematic reviewPublication . Fréry, Nadine; Santonen, Tiina; Porras, Simo P.; Fucic, Aleksandra; Leso, Veruscka; Bousoumah, Radia; Duca, Radu Corneliu; El Yamani, Mounia; Kolossa-Gehring, Marike; Ndaw, Sophie; Viegas, Susana; Iavicoli, IvoIntroduction: Phthalates, a group of ubiquitous industrial chemicals, have been widely used in occupational settings, mainly as plasticizers in a variety of applications. Occupational exposure to different phthalates has been studied in several occupational settings using human biomonitoring (HBM). Aim: To provide a comprehensive review of the available literature on occupational exposure to phthalates assessed using HBM and to determine future data needs on the topic as part of the HBM4EU project. Methods: A systematic search was carried out in the databases of Pubmed, Scopus, and Web of Science for articles published between 2000 and September 4, 2019, using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. A total of 22 studies on the occupational HBM of phthalates were considered suitable for review. Results and discussion: Among the reviewed studies, 19 (86%) focused on DEHP, an old phthalate that is now subject to authorization and planned to be restricted in the EU. Concentrations of MEHHP, one of its metabolites, varied up to 13-fold between studies and across sectors when comparing extreme geometric means, ranging from 11.6 (similar to the general populations) to 151 μg/g creatinine. Only 2 studies focused on newer phthalates such as DiNP and DPHP. Concerning the geographical distribution, 10 studies were performed in Europe (including 6 in Slovakia), 8 in Asia, and 4 in North America, but this distribution is not a good reflection of phthalate production and usage levels worldwide. Most HBM studies were performed in the context of PVC product manufacturing. Future studies should focus on: i) a more uniform approach to sampling timing to facilitate comparisons between studies; ii) newer phthalates, and iii) old phthalates in waste management or recycling. Conclusion: Our findings highlight the lack of recent occupational HBM studies on both old and new phthalate exposure in European countries and the need for a harmonized approach. Considering the important policy actions taken in Europe regarding phthalates, it seems relevant to evaluate the impact of these actions on exposure levels and health risks for workers.
- Caracterização de biomarcadores de genotoxicidade em trabalhadores expostos a crómio hexavalente: um estudo no âmbito da Iniciativa Europeia em Biomonitorização HumanaPublication . Tavares, Ana; Aimonen, Kukka; Ndaw, Sophie; Fucic, Aleksandra; Catalán, Julia; Duca, Radu Corneliu; Godderis, Lode; Gomes, Bruno C.; Janasik, Beata; Ladeira, Carina; Louro, Henriqueta; Namorado, Sónia; Van Nieuwenhuyse, An; Norppa, Hannu; Scheepers, Paul T.; Ventura, Célia; Verdonck, Jelle; Viegas, Susana; Wasowicz, Wojciech; Santonen, Tiina; Silva, Maria JoãoNo âmbito da Iniciativa Europeia em Biomonitorização Humana (HBM4EU) realizou-se um estudo ocupacional, envolvendo trabalhadores com potencial exposição a crómio hexavalente [Cr(VI)], um reconhecido agente carcinogénico. No presente estudo são apresentados os resultados de biomarcadores de genotoxicidade, incluindo a análise de lesão no DNA e de alterações cromossómicas em células sanguíneas. O estudo foi realizado em vários Países Europeus e abrangeu trabalhadores de diversos setores industriais e atividades, bem como um grupo de controlo constituído por trabalhadores administrativos das mesmas empresas (controlo interno) e de outras não relacionadas com produção/aplicação de Cr(VI) (controlo externo). Os resultados mostraram níveis de alterações cromossómicas (ensaio do micronúcleo) e de lesão no DNA (ensaio do cometa) significativamente aumentados nos trabalhadores expostos comparativamente aos controlos externos (p=0,03; p<0,001, respetivamente). Estes resultados sugerem que mesmo um baixo nível de exposição ao Cr(VI) representa um risco acrescido para a saúde dos trabalhadores e, principalmente, para os que realizam cromagem em banho. O grupo controlo interno apresentou níveis médios de lesões no DNA e nos cromossomas comparáveis aos do grupo exposto, salientando a relevância de se considerarem também em risco. O uso de biomarcadores de efeito demonstrou ser crucial para a deteção precoce de efeitos biológicos decorrentes de baixos níveis de exposição ao Cr(VI), contribuindo para a identificação de subgrupos em maior risco. O presente estudo vem apoiar a necessidade de uma reavaliação do limite de exposição ocupacional a Cr(VI), bem como da implementação de medidas de gestão de risco conducentes a uma melhor proteção da saúde dos trabalhadores.
- Developing human biomonitoring as a 21st century toolbox within the European Exposure Science Strategy 2022-2030Publication . Jeddi, Maryam Zare; Hopf, Nancy B.; Louro, Henriqueta; Viegas, Susana; Galea, Karen S.; Pasanen-Kase, Robert; Santonen, Tiina; Mustieles, Vicente; Fernandez, Mariana F.; Verhagen, Hans; Bopp, Stephanie K.; Philippe Antignac, Jean; David, Arthur; Mol, Hans; Barouki, Robert; Audouze, Karine; Duca, Radu-Corneliu; Fantke, Peter; Scheepers, Paul; Ghosh, Manosij; Van Nieuwenhuyse, An; Vicente, Joana Lobo; Trier, Xenia; Rambaud, Loïc; Fillol, Clémence; Denys, Sebastien; Conrad, André; Kolossa-Gehring, Marike; Paini, Alicia; Arnot, Jon; Schulze, Florian; Jones, Kate; Sepai, Ovnair; Ali, Imran; Brennan, Lorraine; Benfenati, Emilio; Cubadda, Francesco; Mantovani, Alberto; Bartonova, Alena; Connolly, Alison; Slobodnik, Jaroslav; de Bruin, Yuri Bruinen; van Klaveren, Jacob; Palmen, Nicole; Dirven, Hubert; Husøy, Trine; Thomsen, Cathrine; Virgolino, Ana; Röösli, Martin; Gant, Tim; von Goetz, Natalie; Bessems, JosHuman biomonitoring (HBM) is a crucial approach for exposure assessment, as emphasised in the European Commission’s Chemicals Strategy for Sustainability (CSS). HBM can help to improve chemical policies in five major key areas: (1) assessing internal and aggregate exposure in different target populations; 2) assessing exposure to chemicals across life stages; (3) assessing combined exposure to multiple chemicals (mixtures); (4) bridging regulatory silos on aggregate exposure; and (5) enhancing the effectiveness of risk management measures. In this strategy paper, we propose a vision and a strategy for the use of HBM in chemical regulations and public health policy in Europe and beyond. We outline six strategic objectives and a roadmap to further strengthen HBM approaches and increase their implementation in the regulatory risk assessment of chemicals to enhance our understanding of exposure and health impacts, enabling timely and targeted policy interventions and risk management. These strategic objectives are: 1) further development of sampling strategies and sample preparation; 2) further development of chemical-analytical HBM methods; 3) improving harmonisation throughout the HBM research life cycle; 4) further development of quality control/quality assurance throughout the HBM research life cycle; 5) obtain sustained funding and reinforcement by legislation; and 6) extend target-specific communication with scientists, policymakers, citizens and other stakeholders. HBM approaches are essential in risk assessment to address scientific, regulatory, and societal challenges. HBM requires full and strong support from the scientific and regulatory domain to reach its full potential in public and occupational health assessment and in regulatory decision-making.
- Harmonized human biomonitoring in European children, teenagers and adults: EU-wide exposure data of 11 chemical substance groups from the HBM4EU Aligned Studies (2014–2021)Publication . Govarts, Eva; Gilles, Liese; Rodriguez Martin, Laura; Santonen, Tiina; Apel, Petra; Alvito, Paula; Anastasi, Elena; Andersen, Helle Raun; Andersson, Anna-Maria; Andryskova, Lenka; Antignac, Jean-Philippe; Appenzeller, Brice; Barbone, Fabio; Barnett-Itzhaki, Zohar; Barouki, Robert; Berman, Tamar; Bil, Wieneke; Borges, Teresa; Buekers, Jurgen; Cañas-Portilla, Ana; Covaci, Adrian; Csako, Zsofia; Den Hond, Elly; Dvorakova, Darina; Fabelova, Lucia; Fletcher, Tony; Frederiksen, Hanne; Gabriel, Catherine; Ganzleben, Catherine; Göen, Thomas; Halldorsson, Thorhallur I.; Haug, Line S.; Horvat, Milena; Huuskonen, Pasi; Imboden, Medea; Jagodic Hudobivnik, Marta; Janasik, Beata; Janev Holcer, Natasa; Karakitsios, Spyros; Katsonouri, Andromachi; Klanova, Jana; Kokaraki, Venetia; Kold Jensen, Tina; Koponen, Jani; Laeremans, Michelle; Laguzzi, Federica; Lange, Rosa; Lemke, Nora; Lignell, Sanna; Lindroos, Anna Karin; Vicente, Joana Lobo; Luijten, Mirjam; Makris, Konstantinos C.; Mazej, Darja; Melymuk, Lisa; Meslin, Matthieu; Mol, Hans; Montazeri, Parisa; Murawski, Aline; Namorado, Sónia; Niemann, Lars; Nübler, Stefanie; Nunes, Baltazar; Olafsdottir, Kristin; Murinova, Lubica Palkovicova; Papaioannou, Nafsika; Pedraza-Diaz, Susana; Piler, Pavel; Plichta, Veronika; Poteser, Michael; Probst-Hensch, Nicole; Rambaud, Loïc; Rauscher-Gabernig, Elke; Rausova, Katarina; Remy, Sylvie; Riou, Margaux; Rosolen, Valentina; Rousselle, Christophe; Rüther, Maria; Sarigiannis, Denis; Silva, Maria J.; Šlejkovec, Zdenka; Tratnik, Janja Snoj; Stajnko, Anja; Szigeti, Tamas; Tarazona, José V.; Thomsen, Cathrine; Tkalec, Žiga; Tolonen, Hanna; Trnovec, Tomas; Uhl, Maria; Van Nieuwenhuyse, An; Vasco, Elsa; Verheyen, Veerle J.; Viegas, Susana; Vinggaard, Anne Marie; Vogel, Nina; Vorkamp, Katrin; Wasowicz, Wojciech; Weber, Till; Wimmerova, Sona; Woutersen, Marjolijn; Zimmermann, Philipp; Zvonar, Martin; Koch, Holger; Kolossa-Gehring, Marike; Esteban López, Marta; Castaño, Argelia; Stewart, Lorraine; Sepai, Ovnair; Schoeters, GreetAs one of the core elements of the European Human Biomonitoring Initiative (HBM4EU) a human biomonitoring (HBM) survey was conducted in 23 countries to generate EU-wide comparable HBM data. This survey has built on existing HBM capacity in Europe by aligning national or regional HBM studies, referred to as the HBM4EU Aligned Studies. The HBM4EU Aligned Studies included a total of 10,795 participants from three age groups: (i) 3,576 children aged 6-12 years, (ii) 3,117 teenagers aged 12-18 years, and (iii) 4,102 young adults aged 20-39 years. The participants were recruited between 2014 and 2021 in 11-12 countries per age group, geographically distributed across Europe. Depending on the age group, internal exposure to phthalates and the substitute DINCH, halogenated and organophosphorus flame retardants, per- and polyfluoroalkyl substances (PFASs), cadmium, bisphenols, polycyclic aromatic hydrocarbons (PAHs), arsenic species, acrylamide, mycotoxins (deoxynivalenol (total DON)), benzophenones and selected pesticides was assessed by measuring substance specific biomarkers subjected to stringent quality control programs for chemical analysis. For substance groups analyzed in different age groups higher average exposure levels were observed in the youngest age group, i.e., phthalates/DINCH in children versus teenagers, acrylamide and pesticides in children versus adults, and benzophenones in teenagers versus adults. Many biomarkers in teenagers and adults varied significantly according to educational attainment, with higher exposure levels of bisphenols, phthalates, benzophenones, PAHs, and acrylamide in participants (from households) with lower educational attainment, while teenagers from households with higher educational attainment have higher exposure levels for PFASs and arsenic. In children, a social gradient was only observed for the non-specific pyrethroid metabolite 3-PBA and di-isodecyl phthalate (DiDP), with higher levels in children from households with higher educational attainment. Geographical variations were seen for all exposure biomarkers. For 15 biomarkers, the available health-based HBM guidance values were exceeded with the highest exceedance rates for toxicologically relevant arsenic in teenagers (40%), 3-PBA in children (36%), and between 11 and 14% for total DON, Σ (PFOA + PFNA + PFHxS + PFOS), bisphenol S and cadmium. The infrastructure and harmonized approach succeeded in obtaining comparable European-wide internal exposure data for a prioritized set of 11 chemical groups. These data serve as a reference for comparison at the global level, provide a baseline to compare the efficacy of the European Commission's chemical strategy for sustainability, and will give leverage to national policymakers for the implementation of targeted measures.
- HBM4EU chromates study: determinants of exposure to hexavalent chromium in plating, welding and other occupational settingsPublication . Viegas, Susana; Martins, Carla; Bocca, Beatrice; Bousoumah, Radia; Duca, Radu Corneliu; Galea, Karen S.; Godderis, Lode; Iavicoli, Ivo; Janasik, Beata; Jones, Kate; Leese, Elizabeth; Leso, Veruscka; Ndaw, Sophie; van Nieuwenhuyse, An; Poels, Katrien; Porras, Simo P.; Ruggieri, Flavia; Silva, Maria João; Verdonck, Jelle; Wasowicz, Wojciech; Scheepers, Paul T. J.; Santonen, Tiina; Ladeira, Carina; Ribeiro, EdnaWork-related exposures in industrial processing of chromate (chrome plating, surface treatment, and welding) raise concerns regarding the health risk of hexavalent chromium (Cr(VI)). In this study, performed under the HBM4EU project, we focused on better understanding the determinants of exposure and recognising how risk management measures (RMMs) contribute to a reduction in exposure. HBM and occupational hygiene data were collected from 399 workers and 203 controls recruited in nine European countries. Urinary total chromium (U-Cr), personal inhalable and respirable dust of Cr and Cr(VI), and Cr from hand wipes were collected. Data on the RMMs were collected by questionnaires. We studied the association between different exposure parameters and the use of RMMs. The relationship between exposure by inhalation and U-Cr in different worker groups was analysed using regression analysis and found a strong association. Automatisation of Cr electroplating dipping explained lower exposure levels in platers. The use of personal protective equipment resulted in lower U-Cr levels in welding, bath plating, and painting. An effect of wearing gloves was observed in machining. An effect of local exhaust ventilation and training was observed in welding. Regression analyses showed that in platers, exposure to an air level of 5 µg/m3 corresponds to a U-Cr level of 7 µg/g of creatinine. In welders, the same inhalation exposure resulted in lower U-Cr levels reflecting toxicokinetic differences of different chromium species.
- HBM4EU chromates study: genotoxicity and oxidative stress biomarkers in workers exposed to hexavalent chromiumPublication . Tavares, Ana; Aimonen, Kukka; Ndaw, Sophie; Fučić, Aleksandra; Catalán, Julia; Duca, Radu Corneliu; Godderis, Lode; Gomes, Bruno C.; Janasik, Beata; Ladeira, Carina; Louro, Henriqueta; Namorado, Sónia; Nieuwenhuyse, An Van; Norppa, Hannu; Scheepers, Paul T. J.; Ventura, Célia; Verdonck, Jelle; Viegas, Susana; Wasowicz, Wojciech; Santonen, Tiina; Silva, Maria JoãoA study was conducted within the European Human Biomonitoring Initiative (HBM4EU) to characterize occupational exposure to Cr(VI). Herein we present the results of biomarkers of genotoxicity and oxidative stress, including micronucleus analysis in lymphocytes and reticulocytes, the comet assay in whole blood, and malondialdehyde and 8-oxo-2′-deoxyguanosine in urine. Workers from several Cr(VI)-related industrial activities and controls from industrial (within a company) and non-industrial (outwith company) environments were included. The significantly increased genotoxicity (p = 0.03 for MN in lymphocytes and reticulocytes; p < 0.001 for comet assay data) and oxidative stress levels (p = 0.007 and p < 0.001 for MDA and 8-OHdG levels in pre-shift urine samples, respectively) that were detected in the exposed workers over the outwith company controls suggest that Cr(VI) exposure might still represent a health risk, particularly, for chrome painters and electrolytic bath platers, despite the low Cr exposure. The within-company controls displayed DNA and chromosomal damage levels that were comparable to those of the exposed group, highlighting the relevance of considering all industry workers as potentially exposed. The use of effect biomarkers proved their capacity to detect the early biological effects from low Cr(VI) exposure and to contribute to identifying subgroups that are at higher risk. Overall, this study reinforces the need for further re-evaluation of the occupational exposure limit and better application of protection measures. However, it also raised some additional questions and unexplained inconsistencies that need follow-up studies to be clarified.
- HBM4EU chromates study: overall results and recommendations for the biomonitoring of occupational exposure to hexavalent chromiumPublication . Santonen, Tiina; Porras, Simo P.; Bocca, Beatrice; Bousoumah, Radia; Duca, Radu Corneliu; Galea, Karen S.; Godderis, Lode; Göen, Thomas; Hardy, Emilie; Iavicoli, Ivo; Janasik, Beata; Jones, Kate; Leese, Elizabeth; Leso, Veruscka; Louro, Henriqueta; Majery, Nicole; Ndaw, Sophie; Pinhal, Hermínia; Ruggieri, Flavia; Silva, Maria J.; van Nieuwenhuyse, An; Verdonck, Jelle; Viegas, Susana; Wasowicz, Wojciech; Sepai, Ovnair; Scheepers, Paul T.J.; Aimonen, Kukka; Antoine, Guillaume; Anzion, Rob; Burgart, Manuella; Castaño, Argelia; Cattaneo, Andrea; Cavallo, Domenico Maria; De Palma, Giuseppe; Denis, Flavien; Gambelunghe, Angela; Gomes, Bruno; Hanser, Ogier; Helenius, Riikka; Ladeira, Carina; López, Marta Esteban; Lovreglio, Piero; Marsan, Philippe; Melczer, Mathieu; Nogueira, Ana; Pletea, Elisabeta; Poels, Katrien; Remes, Jouko; Ribeiro, Edna; Santos, Sílvia Reis; Schaefers, Françoise; Spankie, Sally; Spoek, Robert; Rizki, Mohamed; Rousset, Davy; van Dael, Maurice; Veijalainen, HennaExposure to hexavalent chromium [Cr(VI)] may occur in several occupational activities, e.g., welding, Cr(VI) electroplating, and other surface treatment processes. The aim of this study was to provide EU-relevant data on occupational Cr(VI) exposure to support the regulatory risk assessment and decision-making. In addition, the capability and validity of different biomarkers for the assessment of Cr(VI) exposure were evaluated. The study involved nine European countries and involved 399 workers in different industry sectors with exposures to Cr(VI) such as welding, bath plating, applying or removing paint, and other tasks. We also studied 203 controls to establish a background in workers with no direct exposure to Cr(VI). We applied a cross-sectional study design and used chromium in urine as the primary biomonitoring method for Cr(VI) exposure. Additionally, we studied the use of red blood cells (RBC) and exhaled breath condensate (EBC) for biomonitoring of exposure to Cr(VI). Personal measurements were used to study exposure to inhalable and respirable Cr(VI) by personal air sampling. Dermal exposure was studied by taking hand wipe samples. The highest internal exposures were observed in the use of Cr(VI) in electrolytic bath plating. In stainless steel welding, the internal Cr exposure was clearly lower when compared to plating activities. We observed a high correlation between chromium urinary levels and air Cr(VI) or dermal total Cr exposure. Urinary chromium showed its value as a first approach for the assessment of total, internal exposure. Correlations between urinary chromium and Cr(VI) in EBC and Cr in RBC were low, probably due to differences in kinetics and indicating that these biomonitoring approaches may not be interchangeable but rather complementary. This study showed that occupational biomonitoring studies can be conducted successfully by multi-national collaboration and provide relevant information to support policy actions aiming to reduce occupational exposure to chemicals.
- HBM4EU chromates study: reflection and lessons learnt from designing and undertaking a collaborative European biomonitoring study on occupational exposure to hexavalent chromiumPublication . Galea, Karen S.; Porras, Simo P.; Viegas, Susana; Bocca, Beatrice; Bousoumah, Radia; Duca, Radu Corneliu; Godderis, Lode; Iavicoli, Ivo; Janasik, Beata; Jones, Kate; Knudsen, Lisbeth E.; Leese, Elizabeth; Leso, Veruscka; Louro, Henriqueta; Ndaw, Sophie; Ruggieri, Flavia; Sepai, Ovnair; Scheepers, Paul T. J.; Silva, Maria J.; Wasowicz, Wojciech; Santonen, TiinaThe EU human biomonitoring initiative, HBM4EU, aims to co-ordinate and advance human biomonitoring (HBM) across Europe. As part of HBM4EU, we presented a protocol for a multicentre study to characterize occupational exposure to hexavalent chromium (Cr(VI)) in nine European countries (HBM4EU chromates study). This study intended to collect data on current occupational exposure and to test new indicators for chromium (Cr) biomonitoring (Cr(VI) in exhaled breath condensate and Cr in red blood cells), in addition to traditional urinary total Cr analyses. Also, data from occupational hygiene samples and biomarkers of early biological effects, including genetic and epigenetic effects, was obtained, complementing the biomonitoring information. Data collection and analysis was completed, with the project findings being made separately available. As HBM4EU prepares to embark on further European wide biomonitoring studies, we considered it important to reflect on the experiences gained through our harmonised approach. Several practical aspects are highlighted for improvement in future studies, e.g., more thorough/earlier training on the implementation of standard operating procedures for field researchers, training on the use of the data entry template, as well as improved company communications. The HBM4EU chromates study team considered that the study had successfully demonstrated the feasibility of conducting a harmonised multicentre investigation able to achieve the research aims and objectives. This was largely attributable to the engaged multidisciplinary network, committed to deliver clearly understood goals. Such networks take time and investment to develop, but are priceless in terms of their ability to deliver and facilitate knowledge sharing and collaboration.