1 Department of Experimental and Clinical Medicine , University of Florence , Florence , Italy.
2 Section of Gastroenterology and Hepatology, Department of Health Promotion, Mother and Child Care, Internal Medicine and Medical Specialties, PROMISE , University of Palermo , Palermo , Italy.
3 Department of Surgical, Oncological, and Oral Sciences (Di.Chir.On.S.) , University of Palermo , Palermo , Italy.
4 Department of Economics, Business, and Statistics (SEAS) , University of Palermo , Palermo , Italy.
5 Radiology Unit, Diagnostic and Therapeutic Services , IRCCS ISMETT (Mediterranean Institute for Transplantation and Advanced Specialized Therapies) , Palermo , Italy.
6 Center for Research, High Education and Transfer DENOThe , University of Florence , Florence , Italy.
7 Division of Gastroenterology, Modena Hospital , University of Modena and Reggio Emilia , Modena , Italy.