RT Journal Article SR Electronic T1 Measurement of airway hyperresponsiveness: new considerations JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 419 OP 424 DO 10.1136/thx.53.5.419 VO 53 IS 5 A1 Lötvall, Jan A1 Inman, Mark A1 O’Byrne, Paul YR 1998 UL http://thorax.bmj.com/content/53/5/419.abstract AB