| Affiliation: | 1. Division of Gastroenterology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania;2. Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland;3. Fay W. Boozman College of Public Health, University of Arkansas for Medical Sciences, Little Rock, Arkansas;4. Department of Public Health Sciences, Henry Ford Cancer Institute, Henry Ford Health System, Detroit, Michigan;5. Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland Program in Oncology, University of Maryland Marlene and Stewart Greenbaum Comprehensive Cancer Center, Baltimore, Maryland |
