RT Journal Article SR Electronic T1 BCG provides protection for a lifetime JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 724 OP 724 DO 10.1136/thx.2004.la0107 VO 59 IS 8 A1 Boyd, A E YR 2004 UL http://thorax.bmj.com/content/59/8/724.abstract AB