1. Department of Neurology, University of Cincinnati Academic Health Center, Cincinnati, OH, U.S.A.
2. Pediatric Neuroimaging Research Consortium, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, U.S.A.
3. Department of Neurology, University of Cincinnati Academic Health Center, Cincinnati, OH, U.S.A. and Pediatric Neuroimaging Research Consortium, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, U.S.A. and Center for Imaging Research, University of Cincinnati Academic Health Center, Cincinnati, OH, U.S.A. This study was presented in part at the 2011 American Academy of Neurology meeting in Honolulu, Hawaii, U.S.A.