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R. Hiratsuka
Res. Inst. Elect. Commun., Tohoku Univ.
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H. Usa
Biophoton Project, Res. Develop. Corp. Japan
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T. Maeda
Res. Inst. Elect. Commun., Tohoku Univ.
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M. Kobayashi
Biophoton Project, Res. Develop. Corp. Japan
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H. Inaba
Res. Inst. Elect. Commun., Tohoku Univ.:Biophoton Project, Res. Develop. Corp. Japan