Questionnaire for diagnosing asthma-COPD overlap in COPD: Development of ACO screening questionnaire (ACO-Q) by 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

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