Department of Biomedical & Neuromotor Sciences, University of Bologna, Bologna, Italy; Associazione Nazionale Emodializzati, Dialisi e Trapianto, Milano, Italy. Department of Gastrointestinal Diseases, Gastroenterology Division, Sant'Orsola-Malpighi University-Hospital, Bologna, Italy. Multivisceral Transplant Unit, Department of Surgery, Oncology and Gastroenterology, Padua University Hospital, Padua, Italy. Nephrology and Dialysis, Morgagni-Pierantoni Hospital, Forlì, Italy. Isokinetic Medical Group, Education and Research Department, Bologna, Italy. Sports Medicine Unit, Regional Hospital of Ravenna, Ravenna, Italy. Sports Medicine Unit DIMED, Department of Medicine, University of Padua, Padua Italy. Sports Medicine Unit, Regional Hospital of Bologna, Bologna, Italy. Sports Medicine Unit, Regional Hospital of Modena, Modena, Italy. Sport Medicine Unit - Exercise Therapy Center, ASL "Città di Torino," Italy. Sports Medicine Unit, ASST Papa Giovanni XXIII Hospital, Bergamo, Italy. Regional Transplant Center, City of Health and Science Molinette Hospital, Turin, Italy. Department of Biomedical & Neuromotor Sciences, University of Bologna, Bologna, Italy. Italian National Transplant Center, Rome, Italy. Italian National Transplant Center, Rome, Italy. Electronic address: lia.bellis@iss.it.