1. Institute of Social and Preventive Medicine; Bern Switzerland
2. Checkpoint Zürich; Zürich Switzerland
3. Divisions of Gastroenterology and Hepatology and of Clinical Pathology; University Hospitals; Geneva Switzerland
4. University Clinic of Visceral Surgery and Medicine, Inselspital; Bern Switzerland
5. Swiss Hepato-Pancreato-Biliary Center and Department of Gastroenterology and Hepatology; University Hospital; Zürich Switzerland
6. Division of Gastroenterology and Hepatology; University Hospital; Lausanne Switzerland
7. Epatocentro Ticino Foundation; Lugano Switzerland