Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1871-5303&volume=8&issue=4&spage=295&aulast=Kristensen
Immune System and Disorders	free resource	MedlinePlus Health Information	https://medlineplus.gov/immunesystemanddisorders.html
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-CD4-2
	subscription/membership/fee required	Bentham Science Publishers Ltd.	https://www.eurekaselect.com/83613/article
Cited by Patents in	free resource	The Lens - Patent Citations Database	https://www.lens.org/lens/search/patent/list?q=reference_cited.nlp.ids.pmid:19075783