S390 Efficacy and Safety of On-Demand Vonoprazan versus Placebo in the Treatment of Heartburn in Symptomatic Nonerosive Reflux Disease (NERD) Patients: A Phase 2 Randomized Controlled Trial. (October 2022) - Vaezi, Michael F.; Sharma, Prateek; Yadlapati, Rena; Hunt, Barbara; Harris, Tom; Smith, Neila; Leifke, Eckhard; Armstrong, David