1. Abdominal Surgery and Organ Transplantation Unit, Department for the Treatment and Study of Abdominal Diseases and Abdominal Transplantation University of Pittsburgh Medical Center Italy Palermo Italy
2. Istituto di Ricovero e Cura a Carattere Scientifico–Istituto Mediterraneo per i Trapianti e Terapie ad Alta Specializzazione University of Pittsburgh Medical Center Italy Palermo Italy
3. Department of Pediatrics University of Pittsburgh Medical Center Italy Palermo Italy
4. Diagnostic and Therapeutic Services Radiology Unit University of Pittsburgh Medical Center Italy Palermo Italy
5. Department of Surgery and Medical and Surgical Specialties University of Catania Catania Italy