1 Department of Autoimmune Diseases, Reference Centre (UEC/CSUR) for Systemic Autoimmune Diseases, Vasculitis and Autoinflammatory Diseases, Member of ERN-ReCONNET/RITA, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain.
2 Department of Autoimmune Diseases, Reference Centre (UEC/CSUR) for Systemic Autoimmune Diseases, Vasculitis and Autoinflammatory Diseases, Member of ERN-ReCONNET/RITA, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain. Electronic address: rcervera@clinic.cat.