1. Department of Health Sciences Research Mayo Clinic Jacksonville Florida USA
2. Slone Epidemiology Center Boston University Boston Massachusetts USA
3. Behavioral and Epidemiology Research Group American Cancer Society Atlanta Georgia USA
4. Health Science Center University of Florida Jacksonville Florida USA
5. Division of Cancer Epidemiology and Genetics The National Cancer Institute Bethesda Maryland USA
6. Department of Gastroenterology and Hepatology Mayo Clinic Rochester Minnesota USA
7. Department of Transplantation Mayo Clinic Jacksonville Florida USA