[1] Hosp Univ Marques de Valdecilla, Rheumatol Div, Res Grp Genet Epidemiol & Atherosclerosis Syst Di, IDIVAL, Ave Valdecilla S-N, Santander 39008, Spain
[2] Univ Cantabria, Sch Med, Santander, Spain
[3] Univ Witwatersrand, Fac Hlth Sci, Sch Physiol, Cardiovasc Pathophysiol & Genom Res Unit, Johannesburg, South Africa
[4] Hosp Univ Marques de Valdecilla, Dept Rheumatol, IDIVAL, Res Grp Genet Epidemiol & Atherosclerosis Syst Di, Santander, Spain
[5] Hosp Gen Alicante, Dept Rheumatol, Alicante, Spain
[6] Hosp Bellvitge Princeps Espanya, Dept Rheumatol, Barcelona, Spain
[7] Complejo Hosp Univ A Coruna, Dept Rheumatol, La Coruna, Spain
[8] Hosp Nuestra Senora Candelaria, Dept Rheumatol, Tenerife, Spain
[9] Hosp Valle De Hebron, Dept Internal Med, Barcelona, Spain
[10] Hosp San Cecilio, Autoimmune Dis Unit, Granada, Spain
[11] Hosp Univ Princesa, Dept Rheumatol, IIS Princesa, Madrid, Spain
[12] Hosp Virgen Rocio, Autoimmune Dis Unit, Seville, Spain
[13] Hosp San Juan Alicante, Dept Rheumatol, Alicante, Spain
[14] Hosp Univ La Paz, Dept Rheumatol, Madrid, Spain
[15] Hosp Univ 12 Octubre, Dept Rheumatol, Madrid, Spain
[16] Complejo Hosp Univ Ourense, Dept Rheumatol, Orense, Spain
[17] Hosp Virgen Nieves, Dept Rheumatol, Granada, Spain
[18] Complejo Hosp Univ Pontevedra, Dept Rheumatol, Pontevedra, Spain
[19] Complejo Univ Salamanca, Dept Rheumatol, Salamanca, Spain
[20] Hosp Reg Malaga, Autoimmune Dis Unit, Malaga, Spain
[21] Hosp Santa Creu & Sant Pau, Dept Rheumatol, Barcelona, Spain
[22] Hosp Univ San Agustin, Dept Rheumatol, Aviles, Spain
[23] Complejo Hosp Navarra, Dept Rheumatol, Pamplona, Spain
[24] Hosp Univ & Politecn La Fe, Dept Rheumatol, Valencia, Spain
[25] Hosp Carlos Haya, Autoimmune Dis Unit, Malaga, Spain
[26] Hosp Univ Burgos, Dept Rheumatol, Burgos, Spain
[27] Hosp Univ Reina Sofia, Dept Rheumatol, Cordoba, Spain
[28] Hosp Arnau Vilanova, Dept Rheumatol, Valencia, Spain
[29] Hosp Univ Cent Asturias, Autoimmune Dis Unit, Oviedo, Spain
[30] Univ Autonoma Madrid IUAMI, UAM ROCHE, EPID Future, Madrid, Spain