Volume EditorKazuhiro Yamaguchi, MD, PhDDepartment of Respiratory Medicine, Tokyo Medical University, Tokyo, Japan Division of Respiratory Medicine, Tohto Clinic, Kenko-Igaku Association, Tokyo, JapanSeries EditorsHiroyuki Nakamura, Department of Respiratory Medicine, Tokyo Medical University, Ibaraki Medical Center, Ibaraki, JapanKazutetsu Aoshiba, Department of Respiratory Medicine, Tokyo Medical University, Ibaraki Medical Center, Ibaraki, Japan