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*Koichi SAITO
Limited company kougetu (1-5-2, Ebisu, Shibuya-ku, Tokyo, 150-0013)
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*Katsutoshi OHDO
National Institute of Occupational Safety and Health, All Rights Reserved. (1-4-6, Umezono, Kiyose-shi, Tokyo, 204-0024 )
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*Seiichiro SAKURAI
Meiji-Gakuin University Law School (1-2-37, Shirokanedai, Minato-ku, Tokyo, 108-8636)
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*Takao TERANO
Tokyo Institute of Technology Department of computational Intelligence and Systems Science (4259, Nagatsuta-cho, Midori-ku, Yokohama-shi, Kanagawa-ken, 226-8503 )