An inconvenient truth.
D053687:Adult Stem Cells / Q000166:cytology* / Q000378:metabolism; D000818:Animals; D033041:Embryo Research / Q000941:ethics; D053595:Embryonic Stem Cells / Q000166:cytology* / Q000378:metabolism; D006801:Humans; D051379:Mice; D012867:Skin / Q000166:cytology