RT Journal Article SR Electronic T1 Pneumocystis carinii pneumonia: an unsuccessfully treated case JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1235 OP 1237 VO 94 IS 23 A1 F. B. Roberts A1 H. S. Nielsen YR 1966 UL http://www.cmaj.ca/content/94/23/1235.abstract