| http://www.w3.org/ns/prov#value | - There are, however, few viable alternative sources of stem or progenitor cells, particularly human stem or progenitor cells, and thus the supply is limited. [0007] Hu et al. (WO 00/73421 entitled ???Methods of isolation, cryopreservation, and therapeutic use of human amniotic epithelial cells,??? published Dec. 7, 2000) discloses human amniotic epithelial cells derived from placenta at delivery th
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