1. Department of Preventive Medicine, Keck School of Medicine University of Southern California Los Angeles California USA
2. Department of Research & Evaluation Kaiser Permanente Southern California Pasadena California USA
3. Epidemiology Program University of Hawaii Cancer Center Honolulu Hawaii USA
4. Division of Epidemiology, Department of Medicine Vanderbilt Epidemiology Center, Vanderbilt‐Ingram Cancer Center, Vanderbilt University Medical Center Nashville Tennessee USA
5. Division of Gastroenterology, Department of Medicine Cedars‐Sinai Medical Center and Department of Veterans Affairs Los Angeles California USA
6. Cancer Epidemiology Research Program Norris Comprehensive Cancer Center Los Angeles California USA