The risk of serious cardiac arrhythmias among cisapride users in the United Kingdom and Canada. - Walker, Alexander M.; Szneke, Priscilla; Walker, A M; Szneke, P; Weatherby, L B; Dicker, L W; Lanza, L L; Loughlin, J E; Yee, C L; Dreyer, N A (American Journal of Medicine, 1999)