Therapeutic effects and central mechanism of acupuncture and moxibustion for treating functional dyspepsia: study protocol for an fMRI-based randomized controlled trial. - Zhang, Pan; Yin, Tao; Mao, Yang-Ke; He, Zhao-Xuan; Yang, Sha; Huang, Si-Qin; Sun, Rui-Rui; Zeng, Fang (Trials, 2022)