1. Division of Gastroenterology & Hepatology; University Hospital Zurich (USZ); Zurich; Switzerland
2. Institute of Clinical Pharmacology and Visceral Research; University of Bern; Bern; Switzerland
3. Division of Gastroenterology and Hepatology; University Hospital Basel; Basel; Switzerland
4. Division of Biostatistics, Institute of Social und Preventive Medicine; University of Zurich; Zurich; Switzerland
5. Institute for Clinical Chemistry; University Hospital Zurich; Zurich; Switzerland
6. Infectious Diseases Service; Department of Medicine; University Hospital and University of Lausanne (CHUV); Lausanne; Switzerland