1. Department of Legal Medicine and Bioethics, Nagoya University Post Graduate School of Medicine, 65 Tsuruma-cho, Showa-ku, Nagoya 466-8550, Japan, Departments of Legal Medicine and Environmental Science, Hamamatsu University School of Medicine, 3600 Handa-cho, Hamamatsu 431-3192, Japan, and Department of Legal Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan