RT Journal Article SR Electronic T1 AUTHORS' REPLY JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1021 OP 1022 DO 10.1136/thx.50.9.1021-a VO 50 IS 9 A1 Jeff Garrett A1 John Kolbe A1 Glenn Richards A1 Toby Whitlock A1 Harry Rea YR 1995 UL http://thorax.bmj.com/content/50/9/1021.2.abstract AB