Patients will be recruited from within the Vasculitis Clinical Research Consortium (VCRC) Patient Contact Registry to participate in an online questionnaire. More than 2000 patients, representing all the different types of idiopathic vasculitis, are currently enrolled into the on-line registry. The different types of vasculitis available for study include: granulomatosis with polyangiitis (Wegener's granulomatosis), microscopic polyangiitis, Churg-Strauss Syndrome, polyarteritis nodosa, giant cell arteritis, Takayasu's arteritis, Henoch-Schöenlein purpura, Behçets disease, and CNS vasculitis.