%0 Journal Article %T No evidence to support benefit of 14-day courses of amoxicillin-plus-metronidazole as adjunct to non-surgical periodontal treatment at three months %J - %D 2019 %R https://doi.org/10.1038/s41432-019-0013-x %X Data sources Databases including Embase, MEDLINE, The Cochrane Central Register of Controlled Trials and the WHO International Clinical Trial Register Platform were screened by two reviewers. A manual search has been performed in references from included articles and relevant reviews %U https://www.nature.com/articles/s41432-019-0013-x