1. Endoscopy Unit, Department of Digestive Diseases, Hospital Universitari de Bellvitge, Barcelona, Catalonia, Spain
2. Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Catalonia, Spain
3. Universitat de Barcelona, Barcelona, Catalonia, Spain
4. Liver transplant Unit, Department of General Digestive Surgery, Hospital Universitari de Bellvitge, Barcelona, Catalonia, Spain