Affiliation: | 1. Cancer Prevention Fellowship Program, Office of Preventive Oncology (Dr Laiyemo);2. and Biometry Research Group,Division of Cancer Prevention (Dr Laiyemo);3. National Cancer Institute, National Institutes of Health, Bethesda, Maryland;;4. Department of Medicine, Division of Gastroenterology(Drs Jack and Smoot);5. and Department of Medicine, Division of Hematology/Oncology (Dr Dawkins);6. Howard University Hospital, Washington DC. |