Global citimpact: 16.15 Researcher at From the Department of Neurology (Y.H., R.T.) and Human Brain Research Center (N.O., H.F.), Kyoto University Graduate School of Medicine, Kyoto, ; Departments of Regenerative Medicine and Tissue Engineering (Y.H., Y.Y., K.Y., M.I.), Pathology (Y.O.), and Stroke and Cerebrovascular Diseases (K.N., M.I.), National Cerebral and Cardiovascular Center, Osaka, ; Departments of Radiology and Neurology, Massachusetts General Hospital and Harvard Medical School, Boston (T.M.); CREST, Science Technology Corporation, Saitama, (R.T., M.K.); Institute for Ageing and Health, Newcastle University, Campus for Ageing and Vitality, Newcastle Upon Tyne, (R.N.K.); and Division of Biological Science, Nagoya University Graduate School of Science, Nagoya, (M.K.).