1. Department of Gastroenterology and Hepatology, Erasmus University Medical Center, Rotterdam, the Netherlands (P.H.A.W., E.J.K., M.C.W.S.)
2. Department of Biostatistics and Department of Epidemiology, Erasmus University Medical Center, Rotterdam, the Netherlands (N.S.E.)
3. Regional Organization for Population Screening Mid-West Netherlands, Amsterdam, the Netherlands (S.Y.B.)
4. Regional Organization for Population Screening East Netherlands, Deventer, the Netherlands (B.H.)
5. Regional Organization for Population Screening North Netherlands, Groningen, the Netherlands (M.O.P.)
6. Regional Organization for Population Screening South Netherlands, Eindhoven, the Netherlands (J.S.T.)
7. Regional Organization for Population Screening South-West Netherlands, Rotterdam, the Netherlands (C.V.)
8. Department of Pathology, Netherlands Cancer Institute, Amsterdam, the Netherlands (G.A.M.)
9. Department of Public Health, Erasmus University Medical Center, Rotterdam, the Netherlands (I.L.)
10. Department of Gastroenterology and Hepatology, Amsterdam University Medical Center, location AMC, Amsterdam, the Netherlands (E.D.).