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Flowchart summary of the literature search, comprising an update search from 2012 to February 2018 and a catch-up search to ensure the pre-2012 search included the same search terms as the updated search. “Original estimates” refers to studies included in either previous review4, 5. ART – antiretroviral therapy; CINAHL – Cumulative Index to Nursing and Allied Health Literature; UIAI – unprotected insertive anal intercourse; URAI – unprotected receptive anal intercourse.
