1. Department of Orthopaedic and Traumatology, Policlinico Umberto I Hospital—Sapienza, University of Rome, Piazzale A. Moro, 3, 00185 Rome, Italy
2. M.I.T.O. (Infections in Traumatology and Orthopedics Surgery) Study Group, Policlinico Umberto I Hospital, Viale del Policlinico 155, 00161 Rome, Italy
3. Department of Public Health and Infectious Diseases—Sapienza, University of Rome, Piazzale A. Moro 5, 00185 Rome, Italy