1. Department of Public Health; Erasmus Medical Center; Rotterdam The Netherlands
2. Division of Gastroenterology and Hepatology, Department of Medicine; Stanford University; Stanford California
3. Surveillance Information Services; American Cancer Society; Atlanta Georgia
4. Department of Epidemiology and Biostatistics; Memorial Sloan Kettering Cancer Center; New York New York
5. University of Colorado Cancer Center; Denver Colorado
6. Fight Colorectal Cancer; Springfield Missouri
7. University of Colorado Cancer Center and Gastroenterology of the Rockies; Denver Colorado
8. Cancer Control Department; American Cancer Society; Atlanta Georgia