1. J. W. Goethe University Hospital; Frankfurt am Main Germany
2. University Clinic for Visceral Surgery and Medicine; University of Bern; Bern Switzerland
3. Hospital Universitario Valle de Hebrón and CIBERehd del Instituto Carlos III; Barcelona Spain
4. Hospital Carlos III; Madrid Spain
5. Northwest Indiana Center for Clinical Research; Valparaiso IN USA
6. The Liver Institute at Methodist Dallas Medical Center; Dallas TX USA
7. Advance Gastroenterology Associates, LLC; Palm Harbor FL USA
8. Boehringer Ingelheim Pharmaceuticals Inc.; Ridgefield CT USA
9. Boehringer Ingelheim Pharma GmbH & Co. KG; Ingelheim Germany