1. Vasculitis Research Unit, Department of Systemic Autoimmune Diseases, Hospital Clínic, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona , Barcelona, Spain
2. Center for Diagnostic Imaging, Hospitall Clínic, Institut d’Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), University of Barcelona , Barcelona, Spain
3. Department of Nuclear Medicine, University of Barcelona, Hospital Clínic , Barcelona, Spain