1. Department of Psychophysiology, National Institute of Mental Health, National Center of Neurology and Psychiatry, Ogawa-higashi, Kodaira, Tokyo, Japan
2. Division of Public Health, Department of Social Medicine, Nihon University School of Medicine, Ohyaguchikami-machi, Itabashi-ku, Tokyo, Japan
3. Division of Psychiatry, Department of Psychiatry, Nihon University School of Medicine, Ohyaguchikami-machi, Itabashi-ku, Tokyo, Japan