1. Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University School of Medicine, Nashville, Tennessee.
2. Department of Epidemiology, Shanghai Cancer Institute, Shanghai, China.
3. Division of Cancer Epidemiology and Genetics, Department of Health and Human Services, National Cancer Institute, NIH, Bethesda, Maryland.
4. Division of Clinical Pharmacology, Department of Medicine and Pharmacology, Vanderbilt University School of Medicine, Nashville, Tennessee.