1 HPB Surgery and Transplantation Department, Institut Clinic de Malalties Digestives i Metabòliques, Hospital Clínic de Barcelona, Spain; Centre Hépato-Biliaire Paul Brousse, Villejuif, Paris, France. Electronic address: ssanche1@clinic.cat.
2 Centre Hépato-Biliaire Paul Brousse, Villejuif, Paris, France.