1. Division of Gastroenterology and Hepatology; Department of Clinical and Experimental Medicine; Faculty of Health Science; Linköpings University; Linköping; Sweden
2. Department of Gastroenterology; Hospital Universitari Mutua Terrassa; University of Barcelona; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas CIBERehd; Terrassa; Catalonia; Spain
3. Department of Gastroenterology; Køge University Hospital; Faculty of Health and Medical Science; University of Copenhagen; Copenhagen; Denmark