Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=31725455.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31725455/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31725455
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-CD4-1
	subscription/membership/fee required	Wolters Kluwer	https://doi.org/10.1097/CM9.0000000000000517