- Renal function in 1 of the following 2 categories at the time of screening: Group 1 - Severe Renal Impairment (eGFR 15 to 29 mg/min/1.73 m2) and not anticipated to require hemodialysis or renal transplantation, and anticipated to have renal function appropriate to severe renal impairment for the duration of the study OR Group 2 - Normal renal function (eGFR > or = 90 mg/min/1.73 m2)