1 Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Medicina Generale - Emostasi e Trombosi, Milano, and Dipartimento di scienze Biomediche per la Salute, Università degli studi di Milano, Milano, Italy.
2 Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (Ciberehd), Gastrointestinal Bleeding Unit, Department of Gastroenterology, Hospital de Sant Pau, Autonomous University, Barcelona, Spain.
3 Swiss Liver, University Clinic for Visceral Medicine and Surgery, Inselspital, University of Bern, Hepatology, Bern, Switzerland.
4 Division of Gastroenterology, University of Alberta, CEGIIR, Edmonton, AB, Canada.