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*HIROKI KOMORI
Graduate School of Agriculture,Hokkaido University
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HIDEYUKI SAITO
Graduate School of Agriculture,Hokkaido University
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TETSUOU SHIROTA
Graduate School of Agriculture,Hokkaido University
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MASATO SHIBUYA
Graduate School of Agriculture,Hokkaido University
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Trofim C. Maximov
Institute for Biological Problems of the Cryolithozone,Russian Academy of Science
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KUNIHIDE TAKAHASHI
Graduate School of Agriculture,Hokkaido University