K Inoue1, T Fukunaga2, Y Okazazi3, M Nishimura4, Y Fujita5. 1. Department of PUblic Health, Fujita Health University School of Medicine Aichi 470-1192, Japan. inoue@fujita-hu.ac.jp. 2. Tokyo Medical Examiner's Office, Tokyo Metropolitan Government, Tokyo 112-0012, Japan. 3. Tokyo Metropolitan Matsuzawa Hospital, Tokyo 156-0057, Japan. 4. Kawasaki-shi Tama Public Health Center, Kanagawa 214-8570, Japan. 5. Department of Internal Medicine, Division of Medical Oncology, Teikyo University of Medicine, Tokyo 173-8605, Japan.