1. Bone Tumor Center, Istituto Ortopedico Rizzoli
2. Department of Paediatrics, M.D. Anderson Hospital and Tumor Institute, Texas Medical Center, 6723 Bertner Avenue, Houston, Texas 77030, University of Bologna, Istituto Ortopedico Rizzoli;
3. Department of Radiotherapy, Untiversity of Bologna, Istituto Ortopedico Rizzoli, Bologna
4. Bone Tumor Center and 1st Orthopedic Clinic of the University, Istituto Ortopedico Rizzoli, Istituto Ortopedico Rizzoli, Bologna
5. Consultant Pathologist, Bone Tumor Center, Istituto Ortopedico Rizzoli, Bologna