Adult stem cells are also problematic, as they are difficult to identify, purify and grow, and simply may not exist for certain diseased tissues that need to be replaced.
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Nationality: American Type: Politician Born: February 18, 1947 |
“You start realizing that maybe you're the one night a month that people have out, and they don't need to hear your political views or how dark you can get. They just want to laugh for an hour and go home. Once I wrapped my head around that, my act evolved accordingly.”
“It is still not enough for language to have clarity and content... it must also have a goal and an imperative. Otherwise from language we descend to chatter, from chatter to babble and from babble to confusion.”