Cochrane Central Register of Clinical TrialsPan African Clinical Trials RegistryInternational Clinical Trials Registry PlatformClinicaltrials.govJoanna Briggs InstituteAfrican Index MedicusEMBASEpharmacological interventionstargeted diseases
…4 electronic databases (MEDLINE, EMBASE, African Index Medicus, Cochrane Central Register of Clinical Trials) and 3 clinical trials registries platforms (Clinicaltrials.gov…