| Recruiting | N/A | 1600 | Europe, Canada, US, RoW | | University of British Columbia, BC Childrens Hospital Research Institute, University of Oxford | Wegeners Granulomatosis (Granulomatosis With Polyangiitis), Microscopic Polyangiitis, Eosinophilic Granulomatosis With Polyangiitis, Polyarteritis Nodosa, Takayasu Arteritis, Primary CNS Vasculitis, Unclassified Vasculitis | 03/25 | 03/25 | | |