Table 1.

Construction of the search string in PubMed

Core Concept	Combined search terms
HIV	“HIV”[MeSH] OR “HIV”[tiab] OR “human immunodeficiency virus”[tiab]
PrEP	“Pre-Exposure Prophylaxis”[MeSH] OR “pre-exposure prophylaxis”[tiab] OR “preexposure prophylaxis”[tiab] OR “prep”[tiab]
Health services delivery	“Delivery of Health Care”[MeSH] OR “Drug Delivery Systems”[MeSH] OR “health service provision”[tiab]