1. Department of Biochemistry and Molecular Biology, Nippon Medical School, Tokyo, Japan;
2. Graduate School of Comprehensive Human Sciences, Majors in Medical Sciences, University of Tsukuba, Ibaraki, Japan;
3. Takara Bio, Inc., Shiga, Japan;
4. Department of Neurology, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan;
5. Department of Human Genetics, National Center for Child Health and Development, Tokyo, Japan.