[1] Hosp Univ Marques Valdecilla, Riotuerto, Spain
[2] Hosp Univ Marques Valdecilla, IDIVAL, Santander, Spain
[3] Hosp Univ Marques Valdecilla, Div Rheumatol, Immunopathol Grp, IDIVAL, Santander, Cantabria, Spain
[4] Dr Balmis Gen Univ Hosp ISABIAL, Rheumatol Sect, Alicante, Spain
[5] Complexo Hosp Univ A Coruna, La Coruna, Galicia, Spain
[6] Hosp Univ Canarias, Rheumatol, Santa Cruz De Tenerife, Canarias, Spain
[7] Hosp Univ Princesa, Madrid, Spain
[8] Hosp San Juan Alicante, Rheumatol, Alicante, Spain
[9] Hosp Univ Virgen Las Nieves, Granada, Spain
[10] Vall dHebron Hosp Univ & Campus, Internal Med Serv, Barcelona, Spain
[11] Hosp Univ Marques Valdecilla, Immunopathol Grp, Div Rheumatol, IDIVAL, Santander, Spain