[1] Diakoniekrankenhaus Mannheim, Innere Med Klin, D-68163 Mannheim, Germany
[2] DEGEA, Ulm, Germany
[3] BNG, Gastroenterol Schwerpunktpraxis, Schwetzingen, Germany
[4] ALGK, Siegen, Germany
[5] UMM, Mannheim, Germany
[6] Knappschaftskrankenhaus, Med Klin, Bochum, Germany