Two independent reviewers extracted data from each article that met the inclusion criteria. Discrepancies were resolved by a third reviewer to check for consistency. Data extracted from each article included author name; year of publication; location(s) of the study; whether the article focused on HIV prevention or care and treatment, or both; the names of the multi-level approach(es) used; and a concise description on how the approaches were used in the article as described by the authors. Data were extracted using a standard extraction form in Excel.
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