1. Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16-2, Onogawa, Tukuba, Ibaraki 305-0061, Japan
2. Gifu Prefectural Institute of Health and Environmental Sciences, 1-1 Fudogaoka, Naka, Kagamigahara, Gifu 504-0838, Japan
3. Fuji Seiku Kogyosho, Co., Ltd., 6-18, Honmachi, Kano, Gifu 500-8474, Japan
4. Department of Environmental Toxicology, University of California, Davis, California 95616