Name	Info	Provider	Link
Sleep Disorders	free resource	MedlinePlus Health Information	https://medlineplus.gov/sleepdisorders.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=29415200.ui
	free resource	scite Smart Citations	https://scite.ai/reports/29415200
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/biomedgerontology/article-lookup/doi/10.1093/gerona/gly016
Full text from	free resource	Research Portal of the University of Turku	https://urn.fi/URN:NBN:fi-fe2021042822069