[1] Hosp Univ Canarias, Rheumatol, San Cristobal la Laguna, Spain
[2] Spanish Soc Rheumatol, Res Unit, Madrid, Spain
[3] Hosp Virgen Macarena, Rheumatol, Seville, Spain
[4] Hosp Miguel Servet, Rheumatol, Zaragoza, Spain
[5] Hosp Dr Negrin, Las Palmas Gran Canaria, Spain
[6] Hosp Univ Santiago, Rheumatol, Santiago De Compostela, Spain
[7] Hosp La Princesa, Rheumatol, Madrid, Spain
[8] Hosp San Jorge, Rheumatol, Huesca, Spain
[9] Hosp Clin Barcelona, Rheumatol, Barcelona, Spain
[10] Hosp Gen Univ Valencia, Rheumatol, Valencia, Spain
[11] Hosp Vail DHebron, Rheumatol, Barcelona, Spain
[12] Hosp Ramon & Cajal, Rheumatol, Madrid, Spain
[13] Hosp 12 Octubre, Rheumatol, Madrid, Spain
[14] Hosp Clin Univ, Fdn Ramon Dominguez, Rheumatol, Santiago De Compostela, Spain
[15] Hosp Univ Canarias, Reumatol, San Cristobal la Laguna, Spain