RT Journal Article SR Electronic T1 Commentary: upper airways dysfunction JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 696 OP 697 DO 10.1136/thx.50.6.696 VO 50 IS 6 A1 J R Stradling YR 1995 UL http://thorax.bmj.com/content/50/6/696.abstract AB