1 Consortium of Clinical and Basic Research for Arima Syndrome, Japan; Department of Mental Retardation and Birth Defect Research, National Center of Neurology and Psychiatry, Kodaira, Japan. Electronic address: itoh@ncnp.go.jp.
2 Consortium of Clinical and Basic Research for Arima Syndrome, Japan; Division of Pediatrics, Tokyo Metropolitan Tobu Medical Center for Persons with Developmental and Multiple Disabilities, Tokyo, Japan.
3 Consortium of Clinical and Basic Research for Arima Syndrome, Japan; Department of Brain Development and Neural Regeneration, Tokyo Metropolitan Institute of Medical Science, Tokyo, Japan.