[1] University Medical Center,Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology
[2] University Medical Center,Department of Medical Statistics
[3] University Hospital,Department of Medicine II
[4] LMU Munich,Department of Medicine I
[5] University Hospital Halle,Department of Medicine A
[6] University Medicine Greifswald,Division of Gastroenterology, Medical Department II
[7] University Hospital of Leipzig,Department of Medicine II
[8] University Hospital Rostock,Department of Medicine II
[9] University Hospital rechts der Isar,Department of Medical Bioinformatics
[10] Technical University Munich,undefined
[11] University Medical Center,undefined