1 Universitat Autonoma de Barcelona, Systemic Autoimmune Diseases Unit, Internal Medicine Department. Vall d'Hebron General Hospital. Pº Vall d'Hebron 119-129, Barcelona, 08035, Spain.
2 Systemic Autoimmune Diseases Unit, Internal Medicine Department. Vall d'Hebron General Hospital. Pº Vall d'Hebron 119-129, Barcelona, 08035, Spain.