CBT	Cognitive Behavioural Theory
ED	Emergency Department
ETHOS	European Typology of Homelessness and Housing Exclusion
HF	Housing First
MMAT	Mixed Methods Appraisal Tool
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PCP	Primary Care Physician
PTSD	Post-Traumatic Stress Disorder
QCA	Qualitative Content Analysis
RCT	Randomised Controlled Trial
SDGs	Sustainable Development Goals