1. Tettamanti Center, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
2. Hematology and Bone Marrow Transplant Unit, ASST Papa Giovanni XXIII, Bergamo, Italy
3. Pediatrics, Fondazione IRCCS San Gerardo dei Tintori, Monza, Italy
4. Department of Medicine and Surgery, University of Milano-Bicocca, Monza, Italy