RT Journal Article SR Electronic T1 Hyperventilation syndrome JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 740 OP 740 DO 10.1136/thx.56.9.740-b VO 56 IS 9 A1 D M INNOCENTI YR 2001 UL http://thorax.bmj.com/content/56/9/740.3.abstract AB