[1] Hosp Univ La Paz, IdiPaz, Madrid, Spain
[2] Inst Salud Musculoesquelet, Madrid, Spain
[3] Hosp Univ Fdn Alcorcon, Madrid, Spain
[4] Hosp Univ Virgen Macarena, Seville, Spain
[5] Univ Mil Nueva Granada, Bogota, Colombia
[6] Hosp Gen Mexico City, Ciudad De Mexico, Mexico
[7] Univ Cordoba, Hosp Univ Reina Sofia, IMIBIC, Cordoba, Spain
[8] Hosp Gen Univ Gregorio Maranon, Madrid, Spain
[9] Univ Autonoma Barcelona UAB, I3PT, Hosp Univ Parc Tauli Sabadell, Barcelona, Spain
[10] Clin Alemana Univ Desarrollo, Fac Med, Santiago, Chile
[11] Univ Barcelona, Hosp Univ Bellvitge, IDIBELL, Barcelona, Spain
[12] Univ Buenos Aires, Fac Med, Buenos Aires, DF, Argentina
[13] Hop Cochin Hosp, AP HP, PRES Sorbonne Paris Cite, Clin Epidemiol & Biostat,INSERM U1153, Paris, France
[14] Hosp Univ Puerta Hierro, Madrid, Spain
[15] Univ Autonoma Chihuahua, Chihuahua, Chihuahua, Mexico
[16] Unidad Invest Enfermedades Cronicodegenerat, Ciudad De Mexico, Mexico
[17] Clin Colombiana Reumatol Salud Reinun, Bogota, Colombia
[18] Univ Leeds, Leeds Teaching Hosp Trust, NIHR Biomed Res Ctr, Leeds, W Yorkshire, England
[19] Univ Leeds, Leeds Inst Rheumat & Musculoskeletal Med, Leeds, W Yorkshire, England