1. Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Barcelona, Spain;
2. Centro de Investigación Biomédica en Red de Cáncer (CIBERONC); and
3. Vasculitis Research Unit, Department of Autoimmune Diseases and
4. Department of Anatomic Pathology, Hospital Clínic, University of Barcelona, Barcelona, Spain