Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=23482879.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23482879/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/23482879
	free resource	AME Publishing Company	https://doi.org/10.1007/s11670-011-0079-2
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-ERCC2-1