1. College of Environmental Health; Azabu University; Sagamihara Kanagawa 229-8501 Japan
2. Food Research Laboratories; Mitsui Norin Co., Ltd.; Fujieda Shizuoka 426-0133 Japan
3. Research and Investigation Department; Building Management Education Center; Minato-ku Tokyo 108-0073 Japan
4. School of Veterinary Medicine; Azabu University; Sagamihara Kanagawa 229-8501 Japan
5. Faculty of Medical Sciences; Kyushu University; Fukuoka Fukuoka 812-8582 Japan