Name	Info	Provider	Link
	free resource	NCBI Bookshelf	https://www.ncbi.nlm.nih.gov/books/NBK424704
	free resource	National Institute for Health and Care Research Journals Library	https://doi.org/10.3310/hta21080
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/28248154/
	free resource	scite Smart Citations	https://scite.ai/reports/28248154
Full text from	free resource	White Rose Research Online	https://eprints.whiterose.ac.uk/114677/