- European Vasculitis Study Group
 - Focuses on European Union supported clinical trials and treatment of ANCA associated vasculitis and glomerulonephritis (Wegener's granulomatosis and microscopic polyangiitis). - MedlinePlus: Vasculitis
- Includes general information about the illness as well as drugs used in its treatment, specific conditions, and related issues.
- The Johns Hopkins Vasculitis Center
- Information about the centre and a discussion of the types common questions and treatment of vasculitis.
- Vasculitis
- Offers a brief profile of the condition plus links to support organizations.
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