[1] Polo Sanitario San Feliciano, RomaPro, Rome, Italy
[2] Univ Aquila, Dept Life Hlth & Environm Sci, I-67100 Laquila, Italy
[3] San Salvatore Hosp, Mini Invas & Comp Assisted Orthopaed Surg Unit, I-67100 Laquila, Italy
[4] Italian Working Grp Evidence Based Orthopaed, GLOBE, I-00195 Rome, Italy
[5] Italian Natl Inst Hlth, Italian Implantable Prostheses Registry RIPI, I-00161 Rome, Italy
[6] Fdn Policlin Univ Agostino Gemelli IRCCS, Unit Orthoped, I-00168 Rome, Italy
[7] Casa Cura Villa Betania, Orthopaed Dept, I-00165 Rome, Italy