Hiroshi Sugimoto1, Yukiko Era2, Keisuke Sugimoto3. 1. Department of Respiratory Medicine, Kobe Red Cross Hospital, Kobe, Hyogo, Japan dr.sugimoto@gmail.com. 2. Department of Internal Medicine, Kobe Red Cross Hospital, Kobe, Hyogo, Japan. 3. Department of Respiratory Medicine, Kobe Red Cross Hospital, Kobe, Hyogo, Japan.