What criteria were used to include and exclude studies for the evidence reviews?
Randomised trials, non-randomised intervention studies, and other observational studies (including diagnostic or prognostic studies) were included in the evidence reviews. Conference abstracts, literature reviews, posters, letters, editorials, comment articles, unpublished studies and studies not in English were excluded. Data extraction in qualitative reviews is a thorough process and may require more time compared to intervention reviews. Saturation of qualitative studies is common practice, where data extraction is stopped once saturation is reached and no new information emerges from studies that match the review protocol. Any studies for which data were not extracted due to saturation having been reached, but that fit the inclusion criteria of the protocol, were listed in the table for studies identified but not included due to saturation in the appendix for the qualitative evidence review.