Purpura, Thrombocytopenic, IdiopathicPurpura, Thrombotic ThrombocytopenicPurpura, ThrombocytopenicPurpuraPurpura, Schoenlein-HenochPlatelet CountPlasma ExchangeSplenectomyThrombocytopeniaADAM ProteinsPurpura FulminansBlood PlateletsPlatelet TransfusionHemolytic-Uremic SyndromeImmunoglobulins, IntravenousDanazolPlasmapheresisPregnancy Complications, HematologicRho(D) Immune GlobulinEcchymosisAntigens, Human PlateletAutoantibodiesThrombopoietinvon Willebrand FactorIdiopathic Pulmonary FibrosisPurpura, HyperglobulinemicOklahomaMegakaryocytesThrombopoiesisMetalloendopeptidasesAutoimmune DiseasesAnemia, Hemolytic, AutoimmuneReceptors, ThrombopoietinThrombotic MicroangiopathiesImmunoglobulin GAntibodies, Monoclonal, Murine-DerivedAnemia, HemolyticPlatelet Membrane GlycoproteinsAdrenal Cortex HormonesChronic DiseasePrednisoloneScoliosisImmunologic FactorsRecurrenceHemorrhageTreatment OutcomeArthritis, JuvenileDisseminated Intravascular CoagulationIsoantibodiesFatal OutcomeHematologyPlasmaThrombocytosisMethylprednisoloneHemoglobinuriaAcute DiseasePhenazopyridineRetrospective StudiesBlood TransfusionPlatelet Glycoprotein GPIb-IX ComplexAntibodies, MonoclonalTuberculosis, SplenicPlatelet AggregationPrednisoneEpistaxisPancytopeniaGingival HemorrhageRemission InductionLupus Erythematosus, Systemicgamma-GlobulinsImmunosuppressive AgentsAntigen-Antibody ComplexSteroidsNephritisVasculitis, Leukocytoclastic, CutaneousBleeding TimeHematologic DiseasesFollow-Up StudiesHELLP SyndromeReceptors, FcPlatelet Glycoprotein GPIIb-IIIa ComplexIdiopathic Interstitial PneumoniasLeg DermatosesSpleenPulmonary FibrosisSplenic DiseasesCase-Control StudiesAntibody SpecificityTime FactorsBlood Cell CountOxyquinolineHydrazinesCardiomyopathy, DilatedT-Lymphocytopenia, Idiopathic CD4-PositiveImmune System DiseasesSyndromePrognosisStaphylococcal Protein AGlucocorticoidsAntigens, CD20