1. Department of Neurology, National Yang-Ming University School of Medicine, Taipei 112, Taiwan
2. Section of Neurology, Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei City 220, Taiwan
3. MGH/MIT/HMS Athinoula A. Martinos Center for Biomedical Imaging, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02129, USA
4. Department of Neurophysiology of Vision and Neurophthalmology, G.B. Bietti Foundation-IRCCS, 00198 Rome, Italy
5. Institute of Brain Science, National Yang-Ming University School of Medicine, Taipei 112, Taiwan
6. Neurological Institute, Taipei Veterans General Hospital, Taipei 112, Taiwan