The Kansas City Star takes a look at the work of Huang Hongyun, representative of a number of groups worldwide performing varied stem cell therapies in a professional manner, but without the rigors and tests of scientific trials. "Right now, besides ALS and spinal injury, we do brain damage, MS. Also, we treated another patient whose genetic disease caused vision damage. He lost his vision. Not totally. He only can see very, very little. After several weeks, he got some, not very much, but got better. ... So far, he hasn't produced controlled studies that compare the progress of patients who receive the therapy to those who don't. And critics say much of his evidence of patient improvement is based on anecdotes, rather than on hard scientific measurements." Caveat emptor.