Name	Info	Provider	Link
	subscription/membership/fee required	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=0741-5400&date=1996&volume=60&issue=1&spage=27
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-CD4-2
	free resource	NCI CPTAC Assay Portal	https://assays.cancer.gov/non-CPTAC-3397
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/jleukbio/article-lookup/doi/10.1002/jlb.60.1.27