RT Journal Article SR Electronic T1 Lung Function Tests: Physiological Principles and Clinical Applications JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 536 OP 536 DO 10.1136/thorax.55.6.536 VO 55 IS 6 YR 2000 UL http://thorax.bmj.com/content/55/6/536.abstract AB