Name	Info	Provider	Link
	subscription/membership/fee required	Springer	https://doi.org/10.1007/s10911-009-9160-6
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-PGR-2
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:19936891