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Yohmei Hiraga
Department of Respiratory Disease, Sapporo Hospital of Japanese National Railways
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Kohki Kikuchi
Department of Respiratory Disease, Sapporo Hospital of Japanese National Railways
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Asako Yamamoto
Department of Respiratory Disease, Sapporo Hospital of Japanese National Railways
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Teiichi Sasaki
Cent. Clin. Lab. Sapporo Med. Coll. Hosp., Sapporo
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Masato Yamaguchi
Cent. Clin. Lab. Sapporo Med. Coll. Hosp., Sapporo
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Kuniko Tanemura
Cent. Clin. Lab. Sapporo Med. Coll. Hosp., Sapporo
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Tamotsu Futaki
Hokkaido Medical Science, Sapporo
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Masao Asano
Cent. Clin. Lab. Sapporo Med. Coll. Hosp., Sapporo