[1] UOC Rheumatol Hosp S Eugenio, Rome, Italy
[2] L Sacco Univ Hosp, Rheumatol Unit, Milan, Italy
[3] SS Giovanni & Paolo Hosp, Rheumatol Unit, Venice, Italy
[4] Hosp Taranto, Rheumatol Unit, Taranto, Italy
[5] Spedali Civil Brescia, Rheumatol & Clin Immunol, Brescia, Italy
[6] Univ Brescia, Brescia, Italy
[7] Fdn Salvatore Maugeri, IRCCS, Sci Inst Montescano, Dept Clin Neurophysiol, Montescano, PV, Italy
[8] Fdn Salvatore Maugeri, IRCCS, Sci Inst Montescano, Pain Rehabil Unit, Montescano, PV, Italy
[9] Specialist Outpatients Dept, Rheumatol Branch, Belluno, Italy
[10] G Rummo Hosp, Rheumatol Unit, Benevento, Italy
[11] Polytech Univ Marche Reg, Dept Rheumatol, Ancona, Italy
[12] LAquila Univ, Dept Anesthesiol & Pain Med, Laquila, Italy
[13] Univ G dAnnunzio, CeSI G DAnnunzio Fdn, Dept Med & Sci Aging, Chieti, Italy
[14] Univ Roma La Sapienza, Chair Rheumatol, Rome, Italy
[15] Univ Siena, Unit Rheumatol, Siena, Italy
[16] Gen Hosp Pieve Coriano Mantua, Div Rehabil Med & Rheumatol, Mantua, Italy
[17] L Sacco Univ Hosp, Dept Psychiat, Milan, Italy
[18] Univ Padua, IRCCS, IOV Veneto Canc Inst, Dept Pharmacol & Anesthesiol, Padua, Italy
[19] Univ Pisa, S Chiara Hosp, Dept Internal Med, Div Rheumatol, Pisa, Italy
[20] Univ Turin, SCDU Internal Med 1, Dept Clin & Biol Sci, Turin, Italy
[21] Hosp Circolo, Unit Rehabil Med, Saronno, VA, Italy
[22] Univ Turin, ASO San Giovanni Battista Turin, Dept Neurosci, Turin, Italy
[23] Ben Gurion Univ Negev, Soroka Med Ctr, Dept Med H, Beer Sheva, Israel
[24] Ben Gurion Univ Negev, Fac Hlth Sci, Beer Sheva, Israel
[25] Univ Munich, Friedrich Baur Inst, Munich, Germany
[26] Univ Michigan Hlth Syst, Dept Med, Ann Arbor, MI USA