RT Journal Article SR Electronic T1 Obesity, respiratory function and breathlessness JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP S41 OP S44 DO 10.1136/thorax.55.suppl_1.S41 VO 55 IS suppl 1 A1 GJ Gibson YR 2000 UL http://thorax.bmj.com/content/55/suppl_1/S41.abstract AB