1 Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan.
2 Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan; Department of Respiratory Medicine and Allergology, Kindai University Faculty of Medicine, Osaka, Japan. Electronic address: hmatsumoto@med.kindai.ac.jp.
3 Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan; Department of Respiratory Care and Sleep Control Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan.