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*TSUTOMU YAMADA
Graduate School of Science, Tohoku University
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KOJI MINOURA
Graduate School of Science, Tohoku University
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SHIN-ICHI HIRANO
Graduate School of Science, Tohoku University
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SHIN'ICHI SATO
Tohoku University Museum
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HIROKAZU KATO
Graduate School of Science, Tohoku University
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SHINJI SUGIHARA
Radioisotope Center, Kyushu University