Robert J.F. Laheij1, J Th Hermsen, J.B.M.J. Jansen, A. M. Horrevorts, Robert J. Rongen, L ROSSUM, Ellen M. Witteman, R. W. De Koning
1Department of Gastroenterology, UMC St Radboud, Medical Diagnostic Centre, Canisius Wilhelmina Hospital, Nijmegen, The Netherlands. [email protected]