Efficacy of antidepressants in functional dyspepsia: Systematic review and meta-analysis with trial sequential analysis of randomized controlled trials by Shanmugham, Suresh, Mohammed Zuber, Chan, Jia En, Kumar, Suresh, Ching, Siew Mooi, Lee, Yeong Yeh, Vadakkechalil, Harsha, Veettil, Sajesh K.