Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23610694/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/23610694
	free resource	The British Editorial Society of Bone & Joint Surgery	https://boneandjoint.org.uk/article/10.1302/2046-3758.19.2000109