1. Department of Psychiatry, Yokohama Camellia Hospital, 920 Shiranecyo, Asahiku, Kanagawa, Yokohama 241-0003, Japan
2. Department of Psychiatry, Oishi Kinen Hospital, 2-23-1 Nishiaraihoncyo, Adachi, Tokyo 123-0845, Japan
3. Department of Psychiatry, Tokyo Metropolitan Health and Medical Treatment Corporation Ebara Hospital, 4-5-10 Higashiyukigaya, Ota, Tokyo 145-0065, Japan
4. Department of Internal Medicine, Tokyo Metropolitan Bokuto Hospital, 4-23-15 Koutoubashi, Sumida, Tokyo 130-8575, Japan
5. Department of Psychiatry, Matsuzaki Hospital, 67 Sanbongicyomotosanbongi, Aichi, Toyohashi 441-8152, Japan
6. Department of Psychiatry, Tokyo Metropolitan Health and Medical Treatment Corporation Toshima Hospital, 33-1 Sakaecyo, Itabashi, Tokyo 173-0015, Japan