University Hospital Cologne, Cologne, NRW, Germany
University Hospital of Cologne, Cologne, NRW, Germany
University Hospital of Cologne, Cologne, NRW, Germany
University of Freiburg, Freiburg, Germany
University of Regensburg, Regensburg, Germany
Städtisches Klinikum Dresden, Dresden, Germany
UniversitätsSpital Zürich, Zürich, Switzerland
Ascension St John Hospital and Medical Center, Detroit, Michigan, United States
San Filippo Neri Hospital, Roma, Italy
Hôpital Huriez CHU de Lille, Lille, France
Institut de Cancérologie, Strasbourg, France
CHU de Limoges, Limoges, France
University Hospital of Cologne, Clinic for Gastroenterology and Hepatology, Cologne, Germany
University Hospital of Cologne, Cologne, Germany
Klinikum der Universität zu Köln, Köln, Germany
Department II of Internal Medicine, University Hospital Cologne, Cologne, Germany