[1] Hosp Univ Marques Valdecilla, Rheumatol, Santander, Spain
[2] IDIVAL, Inst Invest Marques Valdecilla, Immunopathol Grp, Santander, Spain
[3] Hosp Univ Virgen Victoria, Rheumatol, Malaga, Spain
[4] Hosp Univ Marques Valdecilla, Immunol, Santander, Spain
[5] Hosp Univ Marques Valdecilla, Dermatol, Santander, Spain
[6] Hosp Univ Marques Valdecilla, Pneumol, Santander, Spain
[7] Hosp Univ Marques Valdecilla, Nephrol, Santander, Spain