Antigens, Human PlateletPurpura, Thrombocytopenic, IdiopathicPurpura, ThrombocytopenicPurpura, Thrombotic ThrombocytopenicThrombocytopenia, Neonatal AlloimmunePlatelet CountThrombocytopeniaPlasma ExchangeSplenectomyADAM ProteinsPlatelet TransfusionBlood PlateletsIsoantibodiesImmunoglobulins, IntravenousIsoantigensHemolytic-Uremic SyndromeThrombopoietinPregnancy Complications, HematologicDanazolAutoantibodiesRho(D) Immune GlobulinPlasmapheresisEcchymosisvon Willebrand FactorMegakaryocytesTransplantation, Homologous