Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0006-4971(20)31032-6
Stem Cells	free resource	MedlinePlus Health Information	https://medlineplus.gov/stemcells.html
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:20686118
	subscription/membership/fee required	Silverchair Information Systems	https://ashpublications.org/blood/article-lookup/doi/10.1182/blood-2009-08-238311