RT Journal Article SR Electronic T1 Pneumonia in exacerbations of COPD: what is the clinical significance? JF ERJ Open Research JO erjor FD European Respiratory Society SP 00282-2019 DO 10.1183/23120541.00282-2019 VO 6 IS 1 A1 Trethewey, Samuel P. A1 Hurst, John R. A1 Turner, Alice M. YR 2020 UL https://publications.ersnet.org//content/6/1/00282-2019.abstract AB