Affiliation: | ?Department of Rheumatology, Hospital Universitario de Bellvitge–IDIBELL, Barcelona, Spain;†Department of Rheumatology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain;‡Rheumatology Unit, Hospital de Viladecans, Barcelona, Spain;§Department of Rheumatology, Hospital Clínic de Barcelona–IDIBAPS, Barcelona, Spain |