Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/9332496/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/9332496
	subscription/membership/fee required	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0960-7722&date=1997&volume=30&issue=2&spage=61