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Matsumi TOSAKA
Department of Internal Medicine, Kushiro City General Hospital
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Yoshiro ISHII
Department of Internal Medicine, Kushiro City General Hospital
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Hiromitsu HAGA
Department of Internal Medicine, Kushiro City General Hospital
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Hidekatsu OHTA
Department of Internal Medicine (Section I), Sapporo Medical College
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YUTAKA YOSHIDA
Department of Pathology (Section II), Sapporo Medical College