RESULTS
Our electronic search yielded 4,056 studies, with an additional 9
studies identified through manual searches. After removal of duplicates,
we screened 3,257 titles and abstracts. We assessed 209 full-text
manuscripts for eligibility and included 126 studies in this review
(Figure 1) (see the Supplementary Appendix C for details of studies
features and Appendix D for the list of included studies).