<qa>  What is the clinically significant finding on screening or baseline ECG?- Any clinically significant finding on screening or baseline ECG. Specifically, subjects with any repolarization delay resting QTcB interval 450msec at the screening or baseline mean of triplicate values visit will be excluded. Subjects with a history of additional risk factors for torsade de pointes e.g., heart failure, chronic andor recurrent hypokalemia will also be excluded. 