Creatinine level greater than 1.5 times the upper limit of normal Creatinine =< 1.5 x institutional upper limit of normal within 4 weeks before randomization Creatinine < 1.5 times institutional upper limit of normal, within 21 days prior to study entry Serum creatinine < 1.5 times upper limit of normal OR Creatinine within less than the institutional upper limit of normal Serum creatinine less than 3 times upper limit of normal Creatinine =< 1.5 times the normal upper institutional limit OR creatinine clearance >= 60 mL/min/1.73 m^2 in participants with creatinine levels > 1.5 times the normal upper institutional limit Serum creatinine =< 1.5 times upper limit of institutional normal for age, or and documented within 14 days prior to registration and within 14 days prior to the start of treatment Serum creatinine value of < 1.5 times the upper limit of normal (ULN) Creatinine < 2.0 times upper limit of normal Serum creatinine < 1.5 times upper limit of normal; OR Serum creatinine =< 2 x the institutional upper limit of normal. Serum creatinine < 1.5 times institutional upper limit of normal Creatinine =< 1.5 x institutional upper limit of normal Serum creatinine =< upper limit of institutional normal Creatinine =< 1.5 x institutional upper limit of normal Serum creatinine > 2 times the upper limit of normal Creatinine =< 1.5 X institutional upper limit of normal Creatinine < 1.5 X institutional upper limit of normal Creatinine =< 1.5 x institutional upper limit of normal Serum creatinine =< 1.5 x institutional upper limit of normal Creatinine =< 1.5 x institutional upper limit of normal Creatinine ? 2 times upper limit of normal Serum creatinine of =< 1.5 times upper limit of normal Serum creatinine value of =< 1.5 times the upper limit of normal (ULN) Creatinine =< 1.5 x institutional upper limit of normal Serum creatinine less than or equal to 1.5 x institutional upper limit of normal for age Creatinine =< 1.5 x institutional upper limit of normal EXCLUSION CRITERIA FOR ENROLLMENT: Creatinine >= 2.5 times the upper limit of normal (ULN) Serum creatinine < 1.5 times the upper limit of normal Serum creatinine > 1.5 times the upper limit of normal Serum creatinine =< 1.5 x the institutional upper limit of normal Serum creatinine =< 1.5 times the upper limit of normal (ULN) (normal: =< 1.17 mL/min/1.73 m^2) Serum creatinine =< 1.2 times the upper limit of normal Serum creatinine less than 3 times the upper limit of normal Creatinine =< 2 times upper limit of normal Serum creatinine < 1.5 times upper limit of normal Serum creatinine < 1.5 times upper limit of normal Creatinine =< institutional upper limit of normal Creatinine =< institutional upper limit of normal OR Serum creatinine =< 1.5 times upper limit of institutional for age or Serum creatinine 1.5 times or less than upper limit of normal Creatinine: < 1.5 x institutional upper limit of normal Creatinine =< 1.5 X institutional upper limit of normal Creatinine =< 4 X institutional upper limit of normal Creatinine =< 1.5 x institutional upper limit of normal Serum creatinine =< 1.5 x upper limit of institutional normal Creatinine =< institutional upper limit of normal OR Serum creatinine =< 1.5 x institutional upper limit of normal Creatinine =< 1.5 mg/dL x the institutional upper limit of normal Renal disease: serum creatinine > 2 times upper limit of normal Secondary Registration: serum creatinine =< 1.5 x institutional upper limit of normal Serum creatinine =< 1.5 x institutional upper limit of normal Serum creatinine < 1.5 times the upper limit of normal Serum creatinine < 1.5 x the institutional upper limit of normal Creatinine =< 2 X institutional upper limit of normal Creatinine =< 2.5 x institutional upper limit of normal Creatinine =< 1.5 X institutional upper limit of normal OR Serum creatinine =< the institutional upper limit of normal Creatinine < 1.5 x institutional upper limit of normal OR Serum creatinine =< 1.5 times the institutional upper limit of normal Serum creatinine less than 3 times upper limit of normal Creatinine =< 2 times upper limit of normal Serum creatinine less than 3 times upper limit of normal Creatinine =< 1.5 times the upper limit of normal (ULN) Within 56 days prior to randomization: Serum creatinine =< 1.5 times upper limit of normal (ULN) Serum creatinine should be within normal limits as specified by institutional guidelines; for patients with serum creatinine > upper limit of normal, a 24-hour creatinine clearance will be performed and should be equal to or more than the lower limit of normal Serum creatinine =< 1.5 times the upper limit of normal Creatinine =< 1.5 x the institutional normal upper limit Creatinine =< 2.0 x institutional upper limit of normal Serum creatinine < 1.5 X institutional upper limit of normal Creatinine =< 2 x institutional upper limit of normal if patient has chronic renal insufficiency and creatinine has been stable x > 4 months Serum creatinine 1.5 times or less than upper limit of normal Creatinine within 1.5 times of the institution's upper limit of normal (ULN) Serum creatinine < 1.5 times upper limit of normal; OR Serum creatinine > 3 times the upper limit of normal Creatinine =< 2 x institutional upper limit of normal Creatinine < 2.0 times upper normal limit Creatinine =< 1.5 times the upper limit of normal Serum creatinine =< 1.5 times the upper limit of normal (ULN) Serum creatinine =< 1.5 x the institutional upper limit of normal obtained within 14 days prior to start of therapy Serum creatinine =< 1.5 X institutional upper limit of normal Creatinine =< 2.0 times the institutional upper limit of normal Creatinine =< 1.5 x institutional upper limit of normal OR Creatinine > 2.0 times upper normal limit Creatinine > 1.5 times the institutional upper limit of normal Creatinine =< 2 X institutional upper limit of normal Serum creatinine =< 2 times upper limit of normal Creatinine =< 2 X institutional upper limit of normal Creatinine =< 1.5 times upper limit of normal (ULN) Creatinine < 1.5 times upper limit of normal (ULN) Creatinine =< 1.5 times upper limit of normal (ULN) Patients must have normal organ and marrow function as defined below: leukocytes >3,000/mcL; absolute neutrophil count >1,500/mcL; platelets >100,000/mcL; total bilirubin <1.5 X institutional upper limits of normal; AST(SGOT)/ALT(SGPT) <2.5 X institutional upper limit of normal; Alkaline phosphatase (AP) <2.5 X institutional upper limit of normal; creatinine <1.5X institutional upper limit of normal OR creatinine clearance >50 mL/min/1.73 m2 for patients with creatinine levels above institutional normal Creatinine < 1.5 institutional upper limit of normal OR Serum creatinine < 1.5 times upper limit of laboratory normal Creatinine < 2 times upper limit of normal Serum creatinine of at least 1.5 times the upper limit of normal Serum creatinine =< 2 times the upper limit of normal Creatinine < 2.5 times the upper limit of normal Serum creatinine =< 1.5 times the institutional upper limit of normal (ULN) Creatinine =< 1.5 x institutional upper limit of normal Serum creatinine =< 1.5 the institutional upper limit of normal Creatinine =< 1.5 X institutional upper limit of normal Creatinine =< 2.0 x upper limit of institutional normal for age Serum creatinine =< 1.5 X institutional upper limit of normal Creatinine =< 3 x institutional upper limit of normal Creatinine =< 1.5 x institutional upper limit Serum creatinine < 2 x institutional upper limit of normal OR Creatinine ? 3 times the upper limit of normal (ULN) Grade 2 renal dysfunction: creatinine > 2-3 times the upper limit of normal Creatinine < 1.5 times the upper limit of normal, or: Baseline creatinine (Cr) no greater than 1.5 times the upper limit of normal Serum creatinine =< 2 times the upper limit of normal Serum creatinine must be < 1.5 times the upper limit of the institutional normal range; test results must be no more than 3 months old Serum creatinine < 1.5 times the upper limit of normal Serum creatinine within 1.5 x upper limit of institutional normal Creatinine =< 1.5 x institutional upper limit of normal Creatinine =< institutional upper limit of normal OR Creatinine =< twice upper limit institutional normal Creatinine =< 2.0 times the upper limit of normal SUB-STUDY III: Serum creatinine > 3 times the upper limit of normal Serum creatinine > 2 times the upper limit of normal Serum creatinine > 2 times the upper limit of normal Creatinine =< 1.5 x the institutional upper limit of normal Serum creatinine > 1.5 times upper limit of normal Serum creatinine > 3 times the upper limit of normal Serum ferritin < 2.0 X institutional upper limit of normal Serum ferritin < 2.0 X institutional upper limit of normal Creatinine >= 1.5 times upper limit of normal Creatinine >= 1.5 times upper limit of normal Serum creatinine > 2 times the upper limit of normal Significant history or current renal insufficiency (serum creatinine > 1.5 institutional upper limit of normal) Creatinine =< 1.5 times the institution upper limit of normal (ULN) Creatinine > 1.5 times the institution upper limit of normal (ULN)