1. Rheumatology Department, Hospital Universitario Dr. Negrin, Gran Canaria, Spain
2. Rheumatology Department, Clínica Universidad de Navarra, Madrid, Spain
3. Rheumatology Department, Hospital Universitario Virgen de la Arrixaca, Murcia, Spain
4. Rheumatology Department, Hospital Universitario Infanta Sofía, San Sebastián de los Reyes, Spain
5. Rheumatology Department, Parc de Salut Mar-Hospital del Mar-IMIM, Barcelona, Spain
6. Rheumatology Department, Complejo Hospitalario Universitario A Coruña, A Coruña, Spain
7. Medical Department, GlaxoSmithKline S.A, Madrid, 10 Spain
8. Rheumatology Department, Hospital Vall d’Hebron, Barcelona, Spain