RT Journal Article SR Electronic T1 Statistics in respiratory medicine. 2. Repeatability and method comparison. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 454 OP 456 DO 10.1136/thx.46.6.454 VO 46 IS 6 A1 S Chinn YR 1991 UL http://thorax.bmj.com/content/46/6/454.abstract AB