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*Tatsuo Nagata
Dept. of Ophthalmology, Univ. of Occupational and Environmental Health, Japan
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Tsuneto Iwasaki
Dept. of Ophthalmology, Univ. of Occupational and Environmental Health, Japan
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Toshiaki Kubota
Dept. of Ophthalmology, Univ. of Occupational and Environmental Health, Japan
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Akihiko Tawara
Dept. of Ophthalmology, Univ. of Occupational and Environmental Health, Japan