Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31463039/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31463039
	free resource	The British Editorial Society of Bone & Joint Surgery	https://boneandjoint.org.uk/article/10.1302/2046-3758.87.BJR-2018-0308.R1