?:authorAffiliation
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[\'Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, North 15 West 7, Kita-ku, Sapporo, 060-8638, Japan.\', \'Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, North 15 West 7, Kita-ku, Sapporo, 060-8638, Japan. suzumasa@med.hokudai.ac.jp.\', \'Division of Infection Control, Hokkaido University Hospital, Sapporo, 060-8638, Japan.\', \'Division of Hospital Safety Management, Hokkaido University Hospital, Sapporo, 060-8638, Japan.\']
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