[cnn-photo-caption image=http://i2.cdn.turner.com/cnn/2009/images/06/03/art_stem_family.jpg caption="Sierra Journey Factor, 8, has a muscular disease that her mom, Shaylene Akery, hopes can be treated in China."] By Drew Griffin and David Fitzpatrick CNN Special Investigations Unit TITUSVILLE, Florida (CNN) – It's shortly after 5 a.m. when the phone rings, and on the line is a clearly anxious and worried parent. … Continue reading U.S. patients try stem cell therapies abroad