1. Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA
2. Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, USA
3. Vanderbilt Genetics Institute, Vanderbilt University Medical Center, Nashville, TN, USA
4. Department of Biomedical Informatics, Vanderbilt University Medical Center, Nashville, TN, USA