Affiliation: | ? Department of Autoimmune Diseases, Institut Clínic de Medicina i Dermatologia, Hospital Clínic, Barcelona, Catalonia, Spain † Rheumatology Section, Hospital Universitari Germans Trias i Pujol, Badalona, Catalonia, Spain ‡ Department of Neurology, Hospital Universitari Germans Trias i Pujol, Badalona, Catalonia, Spain § Magnetic Resonance Unit, Hospital Universitari Germans Trias i Pujol, Badalona, Catalonia, Spain |