Name	Info	Provider	Link
Vitamin A	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitamina.html
	free resource	Tehran University of Medical Sciences, The Center for Electronic Resources Provision & Journals Development	http://acta.tums.ac.ir/index.php/acta/article/view/4849
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-CD4-2