Takeshi Hattori a, b, Masaru Amishima a, Daisuke Morinaga a, Keisuke Kamada b, Sho Nakakubo b, Yu Yamashita b, Yasuo Shichinohe c, Shinichi Fujisawa d, Mutsumi Nishida d, Yasuyuki Nasuhara b, e, Takanori Teshima d, f, Satoshi Konno b, ⁎ 
a Department of Respiratory Medicine, National Hospital Organization Hokkaido Medical Center, Sapporo Japan
b Department of Respiratory Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo Japan
c Department of Emergency and Critical Care Medicine, National Hospital Organization Hokkaido Medical Center, Sapporo Japan
d Division of Laboratory and Transfusion Medicine, Hokkaido University Hospital, Sapporo Japan
e Division of Hospital Safety Management, Hokkaido University Hospital, Sapporo Japan
f Department of Hematology, Hokkaido University Faculty of medicine, Sapporo Japan