1. Liver and Multivisceral Transplant Center, University of Modena and Reggio Emilia, Modena, Italy;
2. Liver and Multiorgan Transplant Unit, University of Bologna, Bologna, Italy;
3. Department of Medical and Biological Sciences and Liver Transplant Unit, University of Udine, Udine, Italy;
4. Department of Medical Oncology, National Cancer Institute, Aviano (PN), Italy;
5. Division of Infectious Diseases, University of Ancona, Ancona, Italy;
6. Infectious Diseases Clinic, University of Modena and Reggio Emilia, Modena, Italy