Alobaidi, Nowaf Y, Almeshari, Mohammed, Stockley, James A, Sapey, Elizabeth and Edgar, Ross G (2020) A Systematic Review of the Use of Physiological Tests Assessing the Acute Response to Treatment During Exacerbations of COPD (with a Focus on Small Airway Function). COPD, 17 (6). pp. 711-720. ISSN 1541-2563.