<qa>  What is the second course of treatment for patients with residual leukemia?Patients receive vosaroxin intravenously IV on days 1 and 4 and cytarabine IV continuously on days 1-7 Induction-I. Patients with residual leukemia and for whom a second course is indicated in the judgment of the investigator may undergo a second course of treatment Induction-II 14-57 days after day 1 of Induction-1 