1. Rheumatology Department; Hospital Clinic of Barcelona; Barcelona Spain
2. Guttmann Neurorehabilitation Institute; Universitat Autònoma de Barcelona; Badalona Spain
3. Public Health Department; University of Barcelona; Barcelona Spain
4. Department of Biochemistry and Molecular Genetics; Hospital Clinic of Barcelona; Barcelona Spain
5. CIBERehd; Barcelona Spain
6. Nuclear Medicine Department; Hospital Clínic of Barcelona; Barcelona Spain