Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/26430387/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/26430387
	free resource	scite Smart Citations	https://scite.ai/reports/26430387
	free resource	Spiral, Imperial College Digital Repository	http://hdl.handle.net/10044/1/44300
Full text from	free resource	White Rose Research Online	https://eprints.whiterose.ac.uk/84054/