<qa>  What is the purpose of this study?The purpose of this study is to determine the response rate and response duration with the combination of rituximab 100 mg weekly four weeks, eltrombopag 50mg PO once a day, day 1-28 and high-dose dexamethasone 40mg PO days 1-4 in untreated adult patients with 30109L platelet count diagnosed with immune thrombocytopenia. 