1. Department of Autoimmune Diseases, Hospital Clínic, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona, Barcelona, Catalonia, Spain
2. Department of Internal Medicine, Hospital Pedro Hispano, Matosinhos Local Health Unit, Matosinhos, Portugal
3. Hospital Universitario San Juan de Alicante, Alicante, Spain