RT Journal Article SR Electronic T1 Notification of tuberculosis: how many cases are never reported? JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 583 OP 583 DO 10.1136/thx.48.5.583 VO 48 IS 5 A1 Ormerod, L P YR 1993 UL http://thorax.bmj.com/content/48/5/583.1.abstract AB