1. 1Institute for Clinical and Translational Research, Baylor College of Medicine, Houston, Texas.
2. 2Section of Epidemiology and Population Sciences, Department of Medicine, Baylor College of Medicine, Houston, Texas.
3. 3Duke Cancer Institute, Duke University Medical Center, Durham, North Carolina.
4. 4Dan L. Duncan Comprehensive Cancer Center, Baylor College of Medicine, Houston, Texas.
5. 5Department of Epidemiology and Population Health, School of Medicine, Stanford University, Stanford, California.