Risky Stem-Cell Treatments Come Under F.D.A. Scrutiny — Again
The Food and Drug Administration on Wednesday warned rogue stem-cell clinics to stop selling unproven treatments that could harm patients. The agency’s latest effort, like most of its previous ones, consisted only of letters to companies and clinics. One letter warned a company making products from umbilical-cord blood that it was violating federal law, and…
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