Approximately 16 patients (8 with severe renal impairment and 8 with normal renal function) are planned to be enrolled to obtain at least 12 evaluable patients (6 with severe renal impairment and 6 with normal renal function) in Part A. A patient with severe renal impairment (as measured by the Cockcroft-Gault equation) is defined as having a creatinine clearance (CrCl) of <30 mL/min whilst a patient with normal renal function has a CrCl of ≥90 mL/min. Both the severe renal impairment and normal renal function patients will be recruited such that both groups will be matched for age, sex, and BMI to the maximum extent possible.