<prompt> Answer this question truthfullyWhat causes idiopathic thrombocytopenic purpura?  <response>: <reason> antiphospholipid syndrome von Willebrand factor deficiencyleukemia Medications e.g. quinine, heparin lupus erythematosus cirrhosis, HIV hepatitis Ccan be classified as Primary and secondaryidiopathicAbsence of other cause or disorders.Is immune- mediated thrombocytopenia with an underlying cause, including drug- induced, or systemic illness SLE,HIV. 