[1] Fondazione Don Carlo Gnocchi ONLUS, IRCCS Santa Maria Nascente, Ctr Reumatol & Malattie Metab Minerale Osseo, Milan, Italy
[2] Osped L Sacco, Unita Endocrinol, Milan, Italy
[3] Ist Geriatr Pio Albergo Trivulzio, Milan, Italy
[4] IRCCS Ist Clin Humanitas, Unita Reumatol, Rozzano, Italy
[5] Osped San Paolo, Dipartimento Ortopedia, Milan, Italy
[6] IRCCS Galeazzi, Unita Reumatol, Milan, Italy
[7] Osped Civile Legnano, Legnano, Italy