Name Info Provider Link
subscription/membership/fee required Elsevier Science https://linkinghub.elsevier.com/retrieve/pii/S0012-3692(16)48704-0
Sleep Apnea free resource MedlinePlus Health Information https://medlineplus.gov/sleepapnea.html
subscription/membership/fee required Ovid Technologies, Inc. http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=14555591.ui