WHO International Clinical Trials Registry Platform (ICTRP)CNKIISSNHLCochrane LibrarySound therapyEmbaseplaceboWanfang DataPubMedClinicalTrials.gov+5 more
…, Embase, Cochrane Library, Web of Science, ClinicalTrials.gov, WHO International Clinical Trials Registry Platform (ICTRP), CNKI and Wanfang Data. The literature search is scheduled for …