RT Journal Article SR Electronic T1 Role of breathing exercises in hyperventilating subjects JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 824 OP 824 DO 10.1136/thx.2009.113597 VO 64 IS 9 A1 A B Palamarthy YR 2009 UL http://thorax.bmj.com/content/64/9/824.1.abstract AB