1. Clinic for Gastroenterology, DKD Helios Clinic Wiesbaden, Wiesbaden, Germany
2. Internal Medicine, St. Elisabethen Hospital Frankfurt Artemed SE, Frankfurt, Germany
3. Department Internal Medicine – Gastroenterology, Diabetology, and Hematology/Oncology, Hospital Agatharied, Hausham, Germany
4. Association of the Scientific Medical Societies in Germany e.V. (AWMF), Berlin, Germany
5. Medical Clinic II – Internal Medicine – Gastroenterology, Hepatology, Endocrinology, Hematology, and Oncology, RoMed Clinic Rosenheim, Rosenheim, Germany
6. Medical Clinic, Israelite Hospital, Hamburg, Germany
7. Anesthesia and Intensive Care, Clinic Leer, Leer, Germany