1. Department of Pediatric Neurology and Neuromuscular Laboratory; Hamamatsu City Medical Center for Developmental Medicine; Hamakita Japan
2. ; Department of Pediatrics; Hamamatsu University School of Medicine; Hamamatsu Japan
3. ; Department of Neuromuscular Research; National Institute of Neuroscience; Kodaira Japan
4. National Center of Neurology and Psychiatry; National Center Hospital for Mental, Nervous and Muscular Disorders; Kodaira Japan