[1] Univ Barcelona, Metab Bone Dis Unit, Hosp Clin, Dept Rheumatol, Barcelona, Spain
[2] Univ Barcelona, Hosp Clin, IDIBAPS, Vasculitis Res Unit,Dept Autoimmune Dis, Barcelona, Spain
[3] Univ Barcelona, Hosp Clin, Dept Nucl Med, Barcelona, Spain
[4] Univ Barcelona, Dept Basic Clin Practice, Biostat, Barcelona, Spain