Table 2.

Search terms syntax

Database	Synthix	No
Scopus	( TITLE-ABS-KEY ( human AND immunodeficiency AND virus) AND TITLE-ABS-KEY ( hepatitis AND c) AND TITLE-ABS-KEY ( substance AND abuse) OR TITLE-ABS-KEY ( injecting AND drug AND user) OR TITLE-ABS-KEY ( injecting AND drug AND abuser) OR TITLE-ABS-KEY ( intravenous AND drug AND abuse) OR TITLE-ABS-KEY ( drug AND misuse) OR TITLE-ABS-KEY ( drug AND abuse) OR TITLE-ABS-KEY ( drug AND dependence)) AND DOCTYPE ( ar) AND PUBYEAR > 2002 AND PUBYEAR < 2019 AND ( LIMIT-TO ( AFFILCOUNTRY, "Iran") OR LIMIT-TO ( AFFILCOUNTRY, "Pakistan") OR LIMIT-TO ( AFFILCOUNTRY, "Afghanistan"))	99
Embase	('human immunodeficiency virus infection':ab,ti AND 'hepatitis c virus':ab,ti AND 'substance abuse':ab,ti OR 'injection drug user':ab,ti OR 'injecting drug abuser':ab,ti OR 'intravenous drug abuse':ab,ti OR 'drug misuse':ab,ti OR 'drug abuse':ab,ti OR 'drug dependence':ab,ti) AND afghanistan:ab,ti AND iran: ab,ti AND pakistan: ab,ti AND [2003–2018]/py	309
Web of Sciences	(human immunodeficiency virus) AND TOPIC:(hepatitis C) AND TOPIC: (substance abuse) OR TOPIC: (injecting drug user) OR TOPIC: (injecting drug abuser) OR TOPIC: (intravenous drug abuse) OR TOPIC: (drug misuse) ORTOPIC: (drug dependence) Refined by: COUNTRIES/REGIONS: ( AFGHANISTAN OR PAKISTAN OR IRAN) Timespan: 2003–2018.Indexes: SCI-EXPANDED, SSCI, A&HCI, CPCI-S, CPCI-SSH, BKCI-S, BKCI-SSH, ESCI, CCR-EXPANDED, IC	620
PubMed	(("HIV"[Mesh]) AND "Hepatitis C"[Mesh]) AND "Substance Abuse, Intravenous"[Mesh] Filters: From 2003/01/01 to 2018/12/31, Humans, English, Persian	100