1. Department of Human Anatomy, University of Bologna, Bologna, Italy
2. Institute of Molecular Genetics, National Research Council-Rizzoli Orthopedic Institute, Bologna, Italy
3. Immunohaematology and Transfusion Center, Policlinico S.Orsola-Malpighi, Bologna, Italy
4. Department of Biomedical Sciences and Biotechnology, University of Brescia, Brescia, Italy
5. Paediatric Oncology and Hematology Unit Lalla Seràgnoli, University of Bologna, Bologna, Italy
6. Department of Microbiology & Immunology, School of Medicine, East Carolina University, Greenville, NC, USA