1. Department of Biostatistics, School of Medicine, Virginia Commonwealth University, Richmond, Virginia, USA
2. Occupational and Environmental Epidemiology Branch, Division of Cancer Epidemiology and Genetics (DCEG), National Cancer Institute (NCI), National Institutes of Health (NIH), Department of Health and Human Services (DHHS), Bethesda, Maryland, USA
3. Department of Environmental and Occupational Health, Drexel University School of Public Health, Philadelphia, Pennsylvania, USA
4. Division of Epidemiology, Mayo Clinic, Rochester, Minnesota, USA
5. Department of Family Medicine and Public Health Sciences, Wayne State University, Detroit, Michigan, USA
6. Epidemiology and Biostatistics Program, DCEG, NCI, NIH, DHHS, Bethesda, Maryland, USA