RT Journal Article SR Electronic T1 European standards for lung function testing: 1993 update. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 873 OP 876 DO 10.1136/thx.48.9.873 VO 48 IS 9 A1 Laszlo, G YR 1993 UL http://thorax.bmj.com/content/48/9/873.abstract AB