Because the development plan for Dexlansoprazole MR formulation was revised, the results of 2 identical studies, T-EE04-086 (this study, NCT00255164) and T-EE04-087 (NCT00255151), were combined and analyzed as a single larger study referred to as study T-EE04-086. A total of 451 subjects were included in the combined analysis: 237 subjects were enrolled into Study T-EE04-086, and 214 subjects were enrolled into Study T-EE04-087.