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Y. Okamoto
Dept Ophthalmology, University Tsukuba, Tsukuba, Japan
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M. Sato
Dept Ophthalmology, University Tsukuba, Tsukuba, Japan
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T. Kiuchi
Dept Ophthalmology, University Tsukuba, Tsukuba, Japan
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T. Oshika
Dept Ophthalmology, University Tsukuba, Tsukuba, Japan
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T. Tokunaga
Dept Ophthalmology, Miyata Eye Hosipital, Miyakonojo, Japan
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K. Miyata
Dept Ophthalmology, Miyata Eye Hospital, Miyakonojo, Japan
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T. Yoshida
Canon Sales, Canon Corporation, Tokyo, Japan