Name	Info	Provider	Link
	free resource	J-STAGE, Japan Science and Technology Information Aggregator, Electronic	https://joi.jlc.jst.go.jp/JST.Journalarchive/bbb1992/60.493?lang=en&from=PubMed
Hormones	free resource	MedlinePlus Health Information	https://medlineplus.gov/hormones.html
	subscription/membership/fee required	Taylor & Francis	https://www.tandfonline.com/doi/full/10.1271/bbb.60.493
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-PGR-2
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/bbb/article-lookup/doi/10.1271/bbb.60.493