1. Center for Integrated Human Brain Science, Brain Research Institute, University of Niigata, Niigata 951-8585, Japan
2. Department of Radiological Technology, Faculty of Medical Technology, Niigata University of Health and Welfare, Niigata 950-3198, Japan
3. Department of Radiological Technology, School of Health Sciences, Faculty of Medicine, University of Niigata, Niigata 951-8518, Japan
4. Time Medical Ltd., Hong Kong Science & Technology Park, Hong Kong, China
5. Division of Ultrahigh Field MRI, Institute for Biomedical Sciences, Iwate Medical University, Iwate 028-3694, Japan
6. Department of Neurology, University of California Davis, CA 94553, USA