VasculitisSystemic VasculitisAntibodies, Antineutrophil CytoplasmicWegener GranulomatosisPolyarteritis NodosaMyeloblastinAnti-Neutrophil Cytoplasmic Antibody-Associated VasculitisChurg-Strauss SyndromeNeutrophilsRetinal VasculitisMicroscopic PolyangiitisVasculitis, Leukocytoclastic, CutaneousPeroxidaseArteritisVasculitis, Central Nervous SystemAutoantibodiesAntibodiesPurpura, Schoenlein-HenochMucocutaneous Lymph Node SyndromeGlomerulonephritisSerine EndopeptidasesAntibody SpecificitySkin Diseases, VascularFluorescent Antibody Technique, IndirectCryoglobulinemiaAntibodies, MonoclonalCogan SyndromeEnzyme-Linked Immunosorbent AssayAutoimmune DiseasesAutoantigensImmunosuppressive AgentsPrednisoloneImmunoglobulins, IntravenousPropylthiouracilImmunoglobulin GBehcet SyndromeAntibodies, ViralRheumatoid VasculitisCyclophosphamideAntibodies, BacterialAntibodies, AntinuclearMethylprednisoloneAntithyroid AgentsNeutrophil InfiltrationOtorhinolaryngologic DiseasesGiant Cell ArteritisBiological MarkersFluorescent Antibody TechniqueLupus Erythematosus, SystemicCathepsin GEndocarditis, Subacute BacterialAntibody FormationColitis, UlcerativeAntibodies, NeutralizingCollagen DiseasesRespiratory BurstLactoferrinPlasma ExchangeRetrospective StudiesGlucocorticoidsAntibody AffinityAntibodies, Monoclonal, Murine-DerivedTreatment OutcomeAntigen-Antibody ComplexEpitopesAntibodies, FungalTumor Necrosis Factor-alphaBiopsyNose DiseasesN-Formylmethionine Leucyl-PhenylalanineKidney DiseasesKidneyLeukemia, Myelomonocytic, ChronicLung DiseasesAntibodies, Anti-IdiotypicCytoplasmArthritis, RheumatoidLeukocyte ElastaseSeverity of Illness IndexHemoptysisDrug Therapy, CombinationNeutrophil ActivationCryoglobulinsScleritisCase-Control StudiesLysosomal-Associated Membrane Protein 2Follow-Up StudiesImmunoglobulin MChemotaxis, LeukocyteMethimazoleBinding Sites, AntibodyAzathioprinePurpuraCells, CulturedEndothelium, VascularImmunoglobulin ARecurrenceAnti-Glomerular Basement Membrane DiseaseImmunologic FactorsGraves Disease