Name	Info	Provider	Link
	free resource	Hindawi Limited	https://doi.org/10.1155/2020/1891285
Sleep Apnea	free resource	MedlinePlus Health Information	https://medlineplus.gov/sleepapnea.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33273990/
Full Text at the institutional repository	free resource	Andalusian Health Repository	http://hdl.handle.net/10668/16730
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33273990