Department of Respiratory Medicine, Graduate School of Medicine, Osaka City University, 1-4-3, Asahimachi, Abeno-ku, 545-8585, Osaka, Japan. Department of Clinical Oncology, Graduate School of Medicine, Osaka City University, 1-4-3, Asahimachi, Abeno-ku, 545-8585, Osaka, Japan. kaneda.hiroyasu@med.osaka-cu.ac.jp. Department of Clinical Oncology, Graduate School of Medicine, Osaka City University, 1-4-3, Asahimachi, Abeno-ku, 545-8585, Osaka, Japan.