 3. ITP that has persisted for 3 months. ITP must be diagnosed in accordance The American Society of Hematology 2011 Evidence-based Practice Guideline for Immune Thrombocytopenia Neunert et al. 2011 or the International Consensus Report on The Investigation and Management of Primary Immune Thrombocytopenia Provan et al. 2010, as locally applicable. 