Name Info Provider Link
subscription/membership/fee required Ingenta plc https://www.ingentaconnect.com/openurl?genre=article&issn=&volume=29&issue=8&spage=973&aulast=Avis
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=35881974.ui
subscription/membership/fee required Wolters Kluwer https://doi.org/10.1097/GME.0000000000002010