RT Journal Article SR Electronic T1 The hyperventilation syndrome: a syndrome under threat? JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 30 DO 10.1136/thx.52.2008.S30 VO 52 IS suppl 3 A1 JB Howell YR 1997 UL http://thorax.bmj.com/content/52/suppl_3/30.abstract AB