RT Journal Article SR Electronic T1 Investigation of the patient with pleural effusion (1) JF Clinical Medicine JO Clin Med FD Royal College of Physicians SP 400 OP 400 DO 10.7861/clinmedicine.9-4-400 VO 9 IS 4 A1 Felix Chua A1 Janice Groth YR 2009 UL http://www.rcpjournals.org/content/9/4/400.1.abstract