Term	Query
Peers	Peer navigator* OR patient navigator* OR Peer counselor* OR Peer health navigator* OR peer educator* or patient educator OR community health worker* or CHW* OR community outreach* OR peer advisor or outreach worker* or care navigator* or patient promot* OR Patient advocate* OR patient expert* OR lay health worker* OR patient liaison OR paraprofessional navigation* OR peer volunteer* or peer group* OR peer volunteer* OR community health aid* or patient advocate*or adherence support workers or ASW* or ASWs or health community workers or HCWs
Linkage, adherence and retention	Linkage to care or engagement to care OR linkage* OR retention or attrition or connect or early or initiate or link* to care or engage in care OR “health care utilization*”OR healthcare utilization* OR uptake or access* OR Health service*OR ambulatory care OR outpatient care OR engage* OR enrol* OR link OR enter OR access* OR treatment OR adherence OR service* OR care conti* OR outreach care or link* or programs or improv* OR access OR refer* OR treatment clinic* OR seek service* OR seek care or treatment*OR keep* OR Kept OR return* OR appointment* OR miss* OR re enter OR appointment adherence* OR Re-engage* OR follow-up* OR loss to follow up or visit* OR miss* OR schedule appointment*
Study design	random allocation[MH] OR quasi-experiment [MH] OR quasiexperiment$(MH) OR quasi#random OR quasirandom* OR non-random* OR nonrandom* OR compar*OR “randomized controlled trial*” or controlled clinical trial [MH]OR rct* OR random allocate* OR double#blind method#[MH] or single-blind method[MH] OR clinical trial# [MH] OR (singl*OR doubl* OR tripl*) and (mask* OR blind*) OR (placebo* OR random$ OR research design OR comparative stud$ OR non#randomized trial* OR community trial* OR evaluation stud$ OR follow-up stud$ OR prospective stud* OR control* OR prospective [MH] OR cohort studies [MH] or longitudinal study#[MH] or cohort* OR clinical or trial* cross sectional* quantitative or qualitative
HIV/AIDS	HIV$ or AIDS$ or HIV Infect* or hiv* or hiv-1$ or hiv-2$ or hiv1$ or hiv2$ or hiv infect* or human immunodeficiency virus$ or human immune?deficiency virus$ or human immuno-deficiency virus$ or human immune-deficiency virus$ or (human immun$ and deficiency virus$) or acquired immunodeficiency syndrome$ or acquired immunedeficiency syndrome$ or acquired immuno-deficiency syndrome$ or acquired immune-deficiency syndrome$ or (acquired immun$ and deficiency syndrome$) or Sexually Transmitted Disease$ or sexually transmitted infect$ or sti*