RT Journal Article SR Electronic T1 Assessment of reversibility of airway obstruction in patients with chronic obstructive airways disease. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 907 OP 908 DO 10.1136/thx.45.11.907-b VO 45 IS 11 A1 D C Weir A1 P S Burge YR 1990 UL http://thorax.bmj.com/content/45/11/907.3.abstract AB