1. Department of Preventive Medicine and Biometrics, Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA
2. Department of Environmental and Occupational Health, University of Milan and IRCCS Maggiore Hospital, Regina Elena and Mangiagalli, Center of Molecular and Genetic Epidemiology, Milan, Italy
3. Division of Cancer Epidemiology and Genetics, Occupational and Environmental Epidemiology Branch, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, USA
4. University of Aarhus, Unit of Cellular and Molecular Toxicology, Centre of Arctic Environmental Medicine, Institute of Public Health, University of Aarhus, Aarhus, Denmark