Risky Stem Cell Clinics Take Root in U.S. as Doctors Profit from 'Liquid Gold'

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Professional Research Assistant Patti Estes of Taiga Biotechnologies, Inc., prepares stem cells for an experiment at the Anschutz Medical Campus in Aurora, CO, Friday, June 6, 2011.
( Craig F. Walker/The Denver Post / Getty )
Produced by Ellen Frankman
Hosted by Todd Zwillich
PRI WNYC