1. Department of Gastroenterology, Frankfurt University Hospital, Frankfurt, Germany
2. Department of Gastroenterology, Sana Klinikum GmbH Offenbach, Offenbach, Germany
3. HMS Analytical Software GmbH, HMS Analytical Software, Heidelberg, Germany
4. Department of Medicine, Institute of Biostatistics and Mathematical Modeling, Goethe University of Frankfurt, Frankfurt, Germany
5. Department of Medicine I, Asklepios Paulinen Klinik Wiesbaden, Wiesbaden, Germany