Name	Info	Provider	Link
	free resource	Medknow Publications and Media Pvt Ltd	http://www.medgasres.com/article.asp?issn=2045-9912;year=2020;volume=10;issue=3;spage=130;epage=133;aulast=Chen
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=33004711.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33004711/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33004711