http://www.sciencedaily.com/releases/2009/04/090409103342.htm
Human ES Cells Progress Slowly In Myelin's Direction
ScienceDaily (Apr. 9, 2009) — Scientists from the University of Wisconsin report in the journal Development the successful generation from human embryonic stem cells of a type of cell that can make myelin, a finding that opens up new possibilities for both basic and clinical research.