RT Journal Article
SR Electronic
T1 AUTHOR'S REPLY
JF Thorax
JO Thorax
FD BMJ Publishing Group Ltd and British Thoracic Society
SP 861
OP 861
DO 10.1136/thx.46.11.861-a
VO 46
IS 11
A1 Hetzel, M R
YR 1991
UL http://thorax.bmj.com/content/46/11/861.2.abstract
AB