Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=34028494.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34028494/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/34028494
	free resource	scite Smart Citations	https://scite.ai/reports/34028494
	subscription/membership/fee required	Silverchair Information Systems	https://jamanetwork.com/journals/jamapediatrics/fullarticle/10.1001/jamapediatrics.2021.0766