Treatment regimen. (A) Details of induction course, regimen A. (B) Details of induction course, regimen B. *One dose of GO 9 mg/m2 was given on day 1 for high-risk patients (defined by WBC count >10 × 109/L on presentation) and low-risk patients in whom the WBC count increased to more than 10 × 109/L during the first 4 weeks of therapy. D, day; mCR, marrow complete remission; wks, weeks.