1. Institute of Hematology and Medical Oncology “L.& A. Seràgnoli”, Bologna, Italy
2. Center for Stem Cell Research, S.Orsola‐Malpighi Hospital, Bologna, Italy
3. Department of Internal Medicine and Hepatology, S.Orsola‐Malpighi Hospital, Bologna, Italy
4. Department of Surgery and Organ Transplantation, University of Udine, Udine, Italy
5. Liver and Multi Organ Transplant Unit‐University of Bologna, S.Orsola‐Malpighi Hospital, Bologna, Italy