Data Extraction
Three reviewers (Z.P.X., C.L., W.E.T) independently extracted data using standardized and piloted forms, which were finally checked by other reviewers (H.L.Z., T.S.X.). The baseline information was extracted, including the first author, the publication year, participants, samples, age, gender, the interventions and comparisons with dosage and usage, primary outcomes and secondary outcomes from each trial.