1. Division of Gastroenterology and Hepatology; University Hospital Lausanne; Lausanne Switzerland
2. Institute of Microbiology; University Hospital Lausanne; Lausanne Switzerland
3. Hepatology Service; Ente Ospedaliero Cantonale Ticino; Lugano and University Hospital Geneva; Geneva Switzerland
4. Hepatology; University Clinic for Visceral Surgery and Medicine; University Hospital Berne; Berne Switzerland
5. Division of Gastroenterology and Hepatology; University Hospital Zurich; Zurich Switzerland
6. Neurocenter of Southern Switzerland; Lugano Switzerland
7. Division of Gastroenterology and Hepatology; Cantonal Hospital St. Gallen; St. Gallen Switzerland
8. Epatocentro Ticino; Lugano Switzerland
9. Division of Immunology and Allergy; University Hospital Lausanne; Lausanne Switzerland