1 Division of Abdominal Transplantation and Hepatobiliopancreatic Surgery, Bambino Gesù Children's Research Hospital Istituto di Ricovero e Cura a Carattere Scientifico, Rome, Italy.
2 Italian National Transplant Center, Italian National Institute of Health, Rome, Italy.
3 Division of Liver and Small Bowel Transplantation, Azienda Ospedaliera Papa Giovanni XXIII, Bergamo, Italy.
4 Hepatobiliary Surgery and Liver Transplant Center, Padova University Hospital, Padova, Italy.
5 North Italy Transplant Program, Coordinamento Trapianti, Fondazione Istituto di Ricovero e Cura a Carattere Scientifico Cà Granda, Ospedale Maggiore Policlinico, Milan, Italy.