Despite the proliferation of stem cell clinics offering therapies the businesses say can effectively treat a number of physical disorders and restore healthy conditions in various areas of the body, new research casts doubt on the extent of the powers of those stem cell treatments. David Brafman and Emma Frow are among those who say some clinics significantly overstate the effectiveness of the therapies. Associate Professor Brafman and Assistant Professor Frow are Fulton Schools biological and health systems engineering faculty members. They have analyzed the advertising of about 60 stem cells clinics and found the claims of many of them are not based on strongly supported medical evidence, and many clinics have increasingly offered stem cell products that have not been approved by the U.S. Food and Drug Administration.