RT Journal Article SR Electronic T1 Exertional multidimensional dyspnoea predicts exacerbation in stable outpatients with COPD JF ERJ Open Research JO erjor FD European Respiratory Society SP 00150-2021 DO 10.1183/23120541.00150-2021 VO 7 IS 4 A1 Masashi Kanezaki A1 Kunihiko Terada A1 Naoya Tanabe A1 Hiroshi Shima A1 Yoko Hamakawa A1 Susumu Sato YR 2021 UL http://openres.ersjournals.com/content/7/4/00150-2021.abstract AB