A Randomised, Placebo-Controlled, Repeat Dose, Double-Blind Two-Period, Cross-over Study to Compare ECG Changes and Pharmacokinetics of Cisapride Following 4 Days of Dosing With Cisapride 20mg QID with Placebo and with Alosetron 1mg BID in Healthy Male and Female Volunteers., Trial ID S3BA1001 | GSK