1. Division of Epidemiology Department of Medicine Vanderbilt University Medical Center and Vanderbilt‐Ingram Cancer Center Vanderbilt University Nashville Tennessee USA
2. Division of Clinical Pharmacology Department of Medicine Vanderbilt University Medical Center Vanderbilt University Nashville Tennessee USA
3. Department of Biostatistics Vanderbilt University Medical Center Vanderbilt University Nashville Tennessee USA
4. Tennessee Department of Health Nashville Tennessee USA
5. Division of Cancer Epidemiology and Genetics, Occupational and Environmental Epidemiology Branch National Cancer Institute Bethesda Maryland USA
6. Shanghai Cancer Institute Renji Hospital Shanghai Jiaotong University School of Medicine Shanghai China