A Single-blind, Non-randomized Pharmacokinetic and Safety Study of Single Dose of GSK573719 and GSK573719 + GW642444 Combination in Healthy Subjects and in Subjects With Severe Renal Impairment

This study will assess the safety and pharmacokinetics of inhaled GSK573719 and GSK573719/vilanterol combination in healthy subjects and in subjects with severe renal impairment. The results of the study will provide guidance on the use of this product in subjects with severe renal impairment.