NOTE: *Patients meeting any of the following criteria are placed in the HR group regardless of MRD response: Philadelphia chromosome-positive disease (BCR/ABL or t[9;22]; translocations [t4;11][q11;q23] or MLL/AF4); "prednisone-poor-response" (≥ 1,000 blasts/mm³ in the peripheral blood on day 8 after prednisone prephase therapy); or no response to study induction therapy (M2/3 at day 33).