1 Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy. giuseppelos@alice.it.
2 Ph.D. Course in Organs and Tissues Transplantation and Cellular Therapies, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy. giuseppelos@alice.it.
3 Section of Pathology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy.
4 Section of Gastroenterology, Department of Emergency and Organ Transplantation, University of Bari, Bari, Italy.