15. Creatinine level < 1.0 x ULN or creatinine clearance ≥ 60 mL/min/1.73 m^2 for patients with creatinine levels above or below the institutional normal (as determined by Cockcroft-Gault equation). For patients with a Body Mass Index (BMI) > 30 kg/m^2, lean body weight should be used to calculate the GFR.