| http://www.w3.org/ns/prov#value | - sionIn order to determine if pleiotrophin is a growth factor for human HSCs, we sorted human cord blood CD34+CD38???Lin??? cells, which are enriched for HSCs14, and placed them in culture with TSF alone or TSF plus 100 or 500 ng ml???1 pleiotrophin for 7 d.
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