Department of Respiratory Medicine, Hikone Municipal Hospital, Hikone, Japan; Department of Advanced Medicine for Respiratory Failure, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Corresponding author at: Department of Respiratory Medicine, Hikone Municipal Hospital, 1882 Hassakacho, Hikone 522-8539, Japan.
E. Ogino
Kyoto Station-front Ear Nose and Allergy Clinic, Kyoto, Japan
H. Yasuba
Department of Airway Medicine, Mitsubishi Kyoto Hospital, Kyoto, Japan
