[1] Hosp Univ Marques de Valdecilla IDIVAL, Div Rheumatol, Immunopathol Grp, Santander, Cantabria, Spain
[2] Hosp Gen La Rioja, Logrono, Spain
[3] CHU Ourense, O Carballino, Spain
[4] Complejo Asistencial Segovia, Segovia, Spain
[5] Hosp Univ Marques de Valdecilla, Santander, Spain
[6] Hosp Univ Marques de Valdecilla, Dept Genet, IDIVAL, Santander, Spain