RT Journal Article SR Electronic T1 Norman R. Barrett, CBE, MA, MChir, FRCS. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 143 OP 143 DO 10.1136/thx.34.2.143 VO 34 IS 2 YR 1979 UL http://thorax.bmj.com/content/34/2/143.abstract AB