RT Journal Article SR Electronic T1 Control and prevention of tuberculosis: a code of practice. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 321 OP 325 DO 10.1136/thx.39.5.321 VO 39 IS 5 A1 N W Horne YR 1984 UL http://thorax.bmj.com/content/39/5/321.abstract AB