Rob P. Adang1, A.W. Ambergen1, Jan Talmon1, Arie Hasman1, Jon F.-J.F.E. Vismans1, Reinhold W. Stockbrügger
1Department of Gastroenterology and Hepatology, University Hospital, Maastricht, and Departments of Statistics and Methodology/Medical Informatics, University of Limburg, Maastricht, The Netherlands