With limited options, some Americans are willing to pay thousands of dollars for stem cell replacement therapy. But the Food and Drug Administration, as well as many scientists, have concerns about its safety and argue more research and oversight is needed.
Source: http://www.npr.org/2013/02/02/170942324/fda-challenges-stem-cell-companies-as-patients-run-out-of-time?ft=1&f=1003
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