?:authorAffiliation
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[\'Department of Respiratory Medicine, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan; Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.\', \'Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, Sapporo, Japan.\', \'Department of Respiratory Medicine and Allergology, Sapporo Medical University School of Medicine, Sapporo, Japan. Electronic address: hchiba@sapmed.ac.jp.\', \'Department of Respiratory Medicine, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan.\', \'Department of Emergency and Critical Care Medicine, National Hospital Organization Hokkaido Medical Center, Sapporo, Japan.\', \'Division of Hospital Safety Management, Hokkaido University Hospital, Sapporo, Japan.\', \'Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.\']
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