1 Department of Pulmonary Medicine, Mie Chuo Medical Center, 2158-5 Hisaimyojin-Cho, Tsu City, Mie 514- 1101, Japan. Electronic address: shidatafireflash@gmail.com.
2 Department of Pulmonary and Critical Care Medicine, Mie University Graduate School of Medicine, Tsu, Mie, Japan.