1. Department of Hepatology and Gastroenterology; Aarhus University Hospital; Aarhus Denmark
2. Department of Gastroenterology and Hepatology; Bispebjerg Hospital; Copenhagen NV 2400 Denmark
3. Division of Digestive and Liver Diseases; University of Texas; Southwestern Medical Center Dallas TX USA
4. Department of Biomedicine - Medical Microbiology and Immunology; Aarhus University; Aarhus Denmark