Evidence of mucosal or internal bleeding or platelet transfusion refractory Patients with evidence of significant mucosal or internal bleeding Evidence of mucosal or internal bleeding and/or are platelet transfusion refractory (i.e. platelet count fails to increase by > , cells/mm after transfusion of an appropriate dose of platelets) Evidence of active mucosal or internal bleeding. Evidence of active mucosal or internal bleeding. Patient has evidence of mucosal or internal bleeding and/or is platelet transfusion refractory Subjects with evidence of mucosal or internal bleeding and/or platelet refractory (i.e., unable to maintain a platelet count >= , cells/mm^) Evidence of mucosal or internal bleeding Patients with evidence of mucosal or internal bleeding and/or platelet transfusion refractory (i.e., unable to maintain a platelet count ? , cells/dL). Evidence of active mucosal or internal bleeding Evidence of mucosal or internal bleeding and/or is platelet transfusion refractory Mucosal or internal bleeding, or platelet transfusion refractory