1 Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Japan. Electronic address: dhayashi@ncnp.go.jp.
2 Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Japan.
3 Department of Psychiatry, Jikei University School of Medicine, Japan.
4 Department of Anesthesiology, National Center Hospital, National Center of Neurology and Psychiatry, Japan.
5 Department of Preventive intervention for Psychiatric Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Japan.
6 Department of Psychiatry, National Center Hospital, National Center of Neurology and Psychiatry, Japan; Department of Psychiatry, Jikei University School of Medicine, Japan.