RT Journal Article SR Electronic T1 Laboratory investigation of Pneumocystis carinii pneumonia. JF Genitourinary Medicine JO Genitourin Med FD BMJ Publishing Group Ltd SP 336 OP 341 DO 10.1136/sti.68.5.336 VO 68 IS 5 A1 Chatterton, J M A1 Yen, D O YR 1992 UL http://sti.bmj.com/content/68/5/336.abstract AB