Name	Info	Provider	Link
Cited by Patents in	free resource	The Lens - Patent Citations Database	https://www.lens.org/lens/search/patent/list?q=reference_cited.nlp.ids.pmid:3183731
	subscription/membership/fee required	Sheridan PubFactory	https://thejns.org/doi/10.3171/jns.1988.69.5.0707