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	subscription/membership/fee required	Atypon	https://www.atsjournals.org/doi/10.1164/rccm.201001-0051OC?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Sleep Apnea	free resource	Genetic Alliance	https://www.diseaseinfosearch.org/result/6636
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=20622036.ui
See the articles recommended by the Faculty of more than 8,000 leading experts in Biology and Medicine.	subscription/membership/fee required	H1 Connect	https://facultyopinions.com/pubmed/20622036