1. National Institute of Health Sciences, Kamiyoga 1-18-1, Setagaya-ku, Tokyo 158-8501, Japan; Nisshin Environmental Planning Inc., Nishiarai-Sakaecho 1-19-8, Adachi-ku, Tokyo 123-0843, Japan; EnBioTec Laboratories Company, Ltd., Chiyoda-Parion Building, Sixth Floor, Kandasuda-cho 2-3-16, Chiyoda-ku, Tokyo 101-0041, Japan; Daiichi Fine Chemical Company, Ltd., Chokeiji 530, Takaoka, Toyama 933-8511, Japan; and Kubota Corporation, Nihonbashi-muromachi 3-1-3, Chuo-ku, Tokyo 103-8310, Japan