1 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.
2 Department of Respiratory Medicine, National Hospital Organization Hokkaido Medical Center, Sapporo Japan.
3 Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo Japan.
4 Department of Emergency and Critical Care Medicine, National Hospital Organization Hokkaido Medical Center, Sapporo Japan.
5 Division of Laboratory and Transfusion Medicine, Hokkaido University Hospital, Sapporo Japan.
6 Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo Japan; Division of Hospital Safety Management, Hokkaido University Hospital, Sapporo Japan.
7 Division of Laboratory and Transfusion Medicine, Hokkaido University Hospital, Sapporo Japan; Department of Hematology, Hokkaido University Faculty of medicine, Sapporo Japan.
8 Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo Japan. Electronic address: satkonno@med.hokudai.ac.jp.