1. Department of Dermatology, Hospital Clínic de Barcelona University of Barcelona Barcelona Catalunya Spain
2. Muscle Research Unit, Internal Medicine Service Hospital Clinic Barcelona Catalunya Spain
3. CIBERER, IDIBAPS and University of Barcelona Barcelona Catalunya Spain
4. Department of Internal Medicine, Hospital Clínic de Barcelona University of Barcelona Barcelona Spain
5. Department of Autoimmune Diseases, Hospital Clínic de Barcelona University of Barcelona Barcelona Spain
6. Department of Internal Medicine Hospital Vega Baja Orihuela Spain