- Adequate renal function defined by an estimated glomerular filtration rate (GFR) greater than (>) 45 milliliter per minute (mL/min) according to the 4-component Modification of Diet in Renal Disease (MDRD) equation. (GFR [mL/min/1.73 m2] = 175 x serum creatinine (Scr)-1.154 x age-0.203 x 1.212 [if African American] x 0.742 [if female]).