Agaplesion Markus-Krankenhaus, Frankfurt a.M., Germany
Agaplesion Markus-Krankenhaus, 1st Dept. of Medicine, Frankfurt a.M., Germany
Centre for Digestive Diseases, Hamburg, Germany
University Hospital of Linköping, Dept. of Gastroenterology and Hepatology, Linköping, Sweden
Charité-Campus Benjamin Franklin Universitätsmedizin Berlin, Berlin, Germany
Evang. Krankenhaus Kalk, Medical Department, Cologne, Germany
Evangelisches Krankenhaus Kalk, Cologne, Nordrhein-Westfalen, Germany
Prof. M. Trauner, Wien, Austria
Prof. Michael Manns, Hannover, Germany
Kirsten Boberg, Oslo, Norway
Med. Klinik 1 - Markus-Krankenhaus, Frankfurt, Hessen, Germany
Ev. Krankenhaus Kalk, University of Cologne, Köln, Germany
Klinikum Grosshadern, Munich, Germany
Klinikum der Johann Wolfgang Goethe-Universität, Frankfurt a.M., Hessen, Germany