[1] CliCon Srl Hlth Econ & Outcomes Res, Ravenna, Italy
[2] Univ Verona, Rheumatol Unit, Dpt Med, I-37100 Verona, Italy
[3] Univ Naples 2, Dpt Orthoped & Rehabil, Naples, Italy
[4] Azienda Sanitaria ULSS 1B, SOS Dpt Patol Osteoarticolare, Rovigo, Italy
[5] Univ Polo San Paolo, Milan, Italy
[6] Ctr Study Osteoporosis & Metab Bone Dis, Sect Orthopaed & Treviglio BG, Treviglio, Italy
[7] Univ Roma Tor Vergata, Tor Vergata Fdn Univ Hosp, Div Orthopaed & Traumatol, Rome, Italy
[8] Univ Sassari, Orthopaed Clin, I-07100 Sassari, Italy
[9] AO Boiognini, UO Ortopedia Osped Lovere, Lovere, BG, Italy
[10] Amgen Europe GmbH, Zug, Switzerland