1. Autoimmune Diseases Unit, Research and Innovation Group in Autoimmune Diseases, Sanitas Digital Hospital, Hospital-CIMA-Centre Mèdic Milenium Balmes Sanitas, Barcelona, Spain
2. SarcoGEAS Study Group (“Grupo de Estudio de Enfermedades Autoinmunes -GEAS-, Sociedad Española de Medicina Interna -SEMI-), Spain
3. Department of Medicine, University of Cincinnati Medical Center, Cincinnati, OH, USA
4. Department of Autoimmune Diseases, ICMiD, Hospital Clínic, Barcelona, Spain
5. Department of Medicine, University of Barcelona, Barcelona, Spain