VasculitisAntibodies, Antineutrophil CytoplasmicSystemic VasculitisAnti-Neutrophil Cytoplasmic Antibody-Associated VasculitisMyeloblastinWegener GranulomatosisPolyarteritis NodosaChurg-Strauss SyndromeRetinal VasculitisMicroscopic PolyangiitisVasculitis, Leukocytoclastic, CutaneousPurpura, Schoenlein-HenochAntibodiesArteritisPeroxidaseVasculitis, Central Nervous SystemAutoantibodiesMucocutaneous Lymph Node SyndromeGlomerulonephritisSerine EndopeptidasesAntibody SpecificityCryoglobulinemiaNeutrophilsCogan SyndromeFluorescent Antibody Technique, IndirectAntibodies, MonoclonalAutoimmune DiseasesImmunosuppressive AgentsAutoantigensSkin Diseases, VascularEnzyme-Linked Immunosorbent AssayPrednisoloneBehcet SyndromeAntibodies, ViralImmunoglobulin GPropylthiouracilImmunoglobulins, IntravenousRheumatoid VasculitisCyclophosphamideAntibodies, BacterialOtorhinolaryngologic DiseasesGiant Cell ArteritisMethylprednisoloneAntithyroid AgentsRespiratory BurstAntibodies, AntinuclearFluorescent Antibody TechniqueLupus Erythematosus, SystemicBiological MarkersAntibody FormationAntibodies, NeutralizingCollagen DiseasesAntibodies, Monoclonal, Murine-DerivedNeutrophil ActivationKidney DiseasesGlucocorticoidsRetrospective StudiesAntibody AffinityLysosomal-Associated Membrane Protein 2Endocarditis, Subacute BacterialTreatment OutcomePlasma ExchangeAntibodies, Anti-IdiotypicLeukemia, Myelomonocytic, ChronicBiopsyColitis, UlcerativeKidneyAntigen-Antibody ComplexDrug Therapy, CombinationArthritis, RheumatoidCryoglobulinsRecurrenceFollow-Up StudiesLung DiseasesCytoplasmScleritisEpitopesSeverity of Illness IndexAntibodies, FungalCathepsin GBinding Sites, AntibodyImmunoglobulin MTumor Necrosis Factor-alphaRemission InductionCase-Control StudiesPurpuraAzathioprineGraves DiseaseNose DiseasesMethimazoleHIV AntibodiesTakayasu ArteritisSensitivity and Specificity