1. Department of Epidemiology and Environmental Health, School of Public Health and Health Professions University at Buffalo Buffalo New York
2. Huntsman Cancer Institute Salt Lake City Utah
3. Division of Gastroenterology, Department of Internal Medicine University of Utah School of Medicine Salt Lake City Utah
4. Division of Genetic Epidemiology, Department of Internal Medicine University of Utah School of Medicine Salt Lake City Utah
5. Department of Biomedical Informatics University of Utah School of Medicine Salt Lake City Utah
6. George E. Wahlen Department of Veterans Affairs Medical Center Salt Lake City Utah