RT Journal Article SR Electronic T1 British Thoracic Society guidelines on respiratory aspects of fitness for diving JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 3 OP 13 DO 10.1136/thorax.58.1.3 VO 58 IS 1 YR 2003 UL http://thorax.bmj.com/content/58/1/3.abstract AB