BBV	Blood Borne Virus
CPR	Cardiopulmonary resuscitation
DRDs	Drug-related deaths
ED	Emergency Department
HAT	Heroin Assisted Treatment
HCV	Hepatitis C Virus
HIV	Human Immunodeficiency Virus
NSP	Needle and Syringe Programmes
OEND	Overdose Education and Naloxone Distribution
OST	Opioid Substitution Treatment
OPS	Overdose Prevention Site
PRISMA	Preferred Reporting Items of Systematic Reviews and Meta-Analyses
PICOS Framework	Populations, interventions, comparators, outcomes and study designs framework for systematic review of literature
PWUD	People Who Use Drugs
SCS	Supervised Consumption Site
RCT	Randomized Controlled Trial
THN	Take-Home Naloxone
UK	United Kingdom
US	United States
VANDU	Vancouver Area Network of Drug Users