Table 2.

Overview of databases searched

Name of database	Contents	Platform/interface
Academic Search Complete	Multi-disciplinary journals, reports and proceedings.	EBSCO Host
CINAHL	Journals related to nursing and allied health issues.	EBSCO Host
MEDLINE	Journals related to life sciences, particularly biomedicine.	Ovid, EBSCO Host
PsycINFO	Peer-reviewed journals related to mental health and the behavioural sciences.	EBSCO Host
Scopus	Abstract and citation database of peer-reviewed research literature from scientific, technical, medical and social science fields and, more recently, also in the arts and humanities.	SciVerse
Web of Science	A multi-disciplinary database containing journals related to medical and social issues among others.	Thomson Reuters
PROSPERO	Protocol details for systematic reviews relevant to health and social care, welfare, public health, education, crime, justice and international development where there is a health-related outcome.	www.crd.york.ac.uk/prospero/
Cochrane	Database of systematic reviews.	www.cochranelibrary.com/
Google Scholar	Academic literature across a range of publishing formats and disciplines.	scholar.google.com