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*Dong su Choi
Graduate school of agriculture, Hokkaido Univ.
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M Quoreshi Ali
Hokkaido Research Center, Forestry and Forest Products research Institute Laval Univ.
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Yutaka Maruyama
Hokkaido Research Center, Forestry and Forest Products research Institute
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Hyun-O Jin
Division of life science, KyungHee Univ., korea
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Takayoshi Koike
Hokkaido Univ. forest, FSC