THANKS, W:

Until Dr. Yamanaka's breakthrough of five years ago, few biologists held out much hope that the cells of an adult person could be made into stem cells, in contrast to those of an embryo.

http://brothersjuddblog.com/archives/2012/12/thanks_w_94.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+BrothersjuddBlog+%28BrothersJudd+Blog%29