Name	Info	Provider	Link
Twins, Triplets, Multiple Births	free resource	MedlinePlus Health Information	https://medlineplus.gov/twinstripletsmultiplebirths.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/26996222/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/26996222
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-HLA-B-1
	subscription/membership/fee required	Cambridge University Press	https://www.cambridge.org/core/product/identifier/S1832427416000116/type/journal_article
	free resource	scite Smart Citations	https://scite.ai/reports/26996222