Questionnaire for diagnosing asthma-COPD overlap in COPD: Development of ACO screening questionnaire (ACO-Q) oleh Yuki Suzuki, Hiroyuki Nagase, Hikaru Toyota, Sho Ohyatsu, Konomi Kobayashi, Yuri Takeshita, Yuuki Uehara, Saya Hattori, Mana Ishizuka, Hirokazu Sakasegawa, Michio Kuramochi, Tadashi Kohyama, Naoya Sugimoto