Authors: P Layer; V Andresen; C Pehl; H Allescher; S C Bischoff; M Classen; P Enck; T Frieling; S Haag; G Holtmann; M Karaus; S Kathemann; J Keller; R Kuhlbusch-Zicklam; W Kruis; J Langhorst; H Matthes; H Mönnikes; S Müller-Lissner; F Musial; B Otto; C Rosenberger; M Schemann; I van der Voort; K Dathe; J C Preiss Journal: Z Gastroenterol Date: 2011-02-01 Impact factor: 2.000