Risky Stem-Cell Treatments Come Under F.D.A. Scrutiny — Again Warning that unapproved stem-cell treatments put patients at risk, the F.D.A. is notifying clinics and manufacturers that flout its rules. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:C.D.C. Advises Against Travel to Zika-Affected Countries in Southeast AsiaIn Hacked Audio, Hillary Clinton Rethinks Obama’s Nuclear Upgrade PlanRosetta Spacecraft to End Mission by Sinking to Its Comet CompanionESA releases stunning images of Comet 67P as Rosetta space craft begins suicide missionWhat is the Rosetta probe? Historic spacecraft set to crash-land on comet TODAYIs New York Ready for Solar Power?