1. Department of Internal Medicine, Northwest Clinics, Alkmaar, The Netherlands
2. Department of Rheumatology, Amsterdam UMC, Vrije Universiteit, Amsterdam, The Netherlands
3. Vasculitis Clinic, Department of Medicine, Division of Rheumatology, Mount Sinai Hospital, Toronto, Canada
4. Department of Nephrology, Amsterdam Cardiovascular Sciences, Amsterdam UMC, Vrije Universiteit, Amsterdam, The Netherlands