Polyarteritis NodosaVasculitisAntibodies, Antineutrophil CytoplasmicSystemic VasculitisWegener GranulomatosisChurg-Strauss SyndromeAnti-Neutrophil Cytoplasmic Antibody-Associated VasculitisVasculitis, Leukocytoclastic, CutaneousMyeloblastinMicroscopic PolyangiitisErythrovirusUrogenital NeoplasmsPurpura, Schoenlein-HenochVasculitis, Central Nervous SystemPlasma ExchangeTakayasu ArteritisPeroxidaseMucocutaneous Lymph Node SyndromeSerine EndopeptidasesImmunosuppressive AgentsAutoantibodiesGlomerulonephritisImmunoglobulins, IntravenousNeutrophilsAutoantigensAutoimmune DiseasesCyclophosphamideEnzyme-Linked Immunosorbent AssayAdrenal Cortex HormonesGlucocorticoidsNecrosisBiological MarkersKidney DiseasesFluorescent Antibody Technique, IndirectRetrospective StudiesTreatment OutcomePropylthiouracilNeutrophil ActivationAntithyroid AgentsCathepsin GLysosomal-Associated Membrane Protein 2Immunoglobulin GRespiratory BurstArteritisEndocarditis, Subacute BacterialGranuloma, Lethal MidlineLactoferrinSkin Diseases, VascularRetinal VasculitisColitis, UlcerativeAntibody SpecificityLeukocyte ElastaseGatekeeping