Risky Stem-Cell Treatments Come Under F.D.A. Scrutiny Again

Risky Stem-Cell Treatments Come Under F.D.A. Scrutiny Again The Food and Drug Administration warned rogue stem-cell clinics on Wednesday 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 […]