Creatinine =< 1.5 Patients with a creatinine =< 2 x normal for age Patients with a creatinine normal for age Serum creatinine > 1.5 x OR creatinine clearance of at least 40 Creatinine < 2 Creatinine < or = 2 Creatinine =< 2.0 Creatinine =< 1.3 Creatinine =< 1.5 Creatinine =< 2.0 Creatinine > 3x normal Creatinine < 1.8 Creatinine =< grade 1 Creatinine < 1.5 Creatinine < 2.0 Creatinine < 1.5 Creatinine < 2.0 Creatinine < 1.5 and creatinine clearance > 45 Creatinine < 2.0 Creatinine =< 1.5 Creatinine < 1.5 Creatinine < 2.0 Creatinine =< 1.2 x normal prior to biopsy Creatinine =< 1.7 Normal creatinine for age Creatinine less than 1.5 Creatinine < 2.0 Creatinine > 2.0 Creatinine > 2.0 Creatinine =< 1.3 Creatinine =< 1.5 Creatinine < 2.0 Patients with a creatinine =< 2 x normal for age Patients with a history of renal disease or patients over 70 with a creatinine > 1.3; creatinine must have been done within the last 12 weeks Creatinine < 1.2