1. School of Public Health, University of California at Berkeley, Berkeley, California, USA
2. School of Public Health, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
3. National Cancer Institute, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, Maryland, USA
4. Institute for Risk Assessment Sciences, Utrecht University, Utrecht, The Netherlands
5. Institute of Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China