RT Journal Article SR Electronic T1 Chlamydia pneumoniae. JF Thorax JO Thorax FD BMJ Publishing Group Ltd and British Thoracic Society SP 1 OP 4 DO 10.1136/thx.48.1.1 VO 48 IS 1 A1 T J Marrie YR 1993 UL http://thorax.bmj.com/content/48/1/1.abstract AB