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Yuji MIYAZAKI
Dept. of Neurosurgery, Sapporo Medical College
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Katsumi SUEMATSU
Dept. of Neurosurgery, Sapporo Medical College
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Ikuro TAKADA
Dept. of Neurosurgery, Sapporo Medical College
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Nobukatsu MATSUMOTO
Dept. of Neurosurgery, Sapporo Medical College
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Masayuki TAKEDA
Dept. of Neurosurgery, Sapporo Medical College