idiopathic thrombocytopenia causesidiopathic thrombopurpura thrombocytopeniachronic idiopathic thrombocytopeniaidiopathic immune thrombocytopeniaacute thrombocytopenic purpuraitp idiopathic thrombocytopeniaidiopathic thrombocytopenic purpuraidiopathic thrombocytopenicidiopathic thrombocythemiaidiopathic myelofibrosisidiopathic purpura