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Takao Wakabayashi
[Japan]
Japan Community Health-care Organization Sapporo Hokushin Hospital, Department of General and Emergency Medicine [Japan]
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Hiroyoshi Iwata
[Japan]
Department of Pharmacology and Therapeutics, University of the Ryukyus [Japan]
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Yoshihisa Tsuji
[Japan]
Department of General Medicine, Sapporo Medical University [Japan]