Name Info Provider Link
subscription/membership/fee required Atypon https://www.liebertpub.com/doi/10.1089/ten.tea.2007.0295?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Stem Cells free resource MedlinePlus Health Information https://medlineplus.gov/stemcells.html