Name	Info	Provider	Link
	free resource	Korean Academy of Medical Sciences	https://jkms.org/DOIx.php?id=10.3346/jkms.1993.8.3.202
Erectile Dysfunction	free resource	MedlinePlus Health Information	https://medlineplus.gov/erectiledysfunction.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/8240750/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/8240750
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-HLA-B-1