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 |
“I was a pitcher, shortstop and outfielder, and the Yankees tried to sign me out of high school as a first-round draft pick in 1981. I turned them down to go to college.”