[1] Hosp Univ Canarias, Div Rheumatol, Tenerife, Spain
[2] Hosp Univ Gran Canaria Dr Negrin, Div Rheumatol, Las Palmas Gran Canaria, Spain
[3] Hosp Univ Insular Gran Canaria, Div Rheumatol, Las Palmas Gran Canaria, Spain
[4] Hosp Univ Canarias, Cent Lab Div, Tenerife, Spain
[5] IDIVAL, Santander, Spain