RT Journal Article SR Electronic T1 Hypercapnia during oxygen therapy in airways obstruction: a reappraisal. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 897 OP 902 DO 10.1136/thx.41.12.897 VO 41 IS 12 A1 J R Stradling YR 1986 UL http://thorax.bmj.com/content/41/12/897.abstract AB