Yuko Miyagoe-Suzuki1, Atsushi Asakura2, Masatoshi Suzuki3. 1. Department of Molecular Therapy, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo 187-8502, Japan. 2. Stem Cell Institute, Paul and Sheila Wellstone Muscular Dystrophy Center, Department of Neurology, University of Minnesota Medical School, Minneapolis, MN 55455, USA. 3. Department of Comparative Biosciences, Stem Cell and Regenerative Medicine Center, University of Wisconsin, Madison, WI 53706, USA.