1. Autoimmune Systemic Diseases Unit, Internal Medicine Department, Hospital Universitari Vall d’Hebron, Barcelona, and Department of Medicine, Faculty of Medicine, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain.
2. Immunology Department, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain.
3. Flow Cytometry Unit, Haematology Department, Hospital Universitari Vall d’Hebron, Barcelona, Spain.
4. Autoimmune Systemic Diseases Unit, Internal Medicine Department, Hospital Universitari Vall d’Hebron, Barcelona, and Department of Medicine, Faculty of Medicine, Universitat Autònoma de Barcelona (UAB), Barcelona, Spain. rsolanslaq@gmail.com