The systematic literature review for each health topic was conducted by one topic leader (see Annex 1 for further details). For quality assurance, a secondary peer reviewer corroborated study selection and data extraction at Stage Four.
Data were screened with the following five stages:
Stage One: electronic database search using terms; with results imported into reference management software, and duplicates removed.
Stage Two: title and abstract reviewed to remove studies not meeting the inclusion criteria (see above).
Stage Three: manuscript review to remove studies that did not meet inclusion criteria; paper selection.
Stage Four: review of references of selected papers (from Stage Three).
Stage Five: final paper selection, data extraction, and quality assessment.
Data was extracted based on the specific points noted below and input into a standardised Excel database:
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