RT Journal Article SR Electronic T1 Pleural infection JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 82 OP 86 DO 10.7861/clinmedicine.12-1-82 VO 12 IS 1 A1 John M Wrightson A1 Nick A Maskell YR 2012 UL http://www.rcpjournals.org/content/12/1/82.abstract