RT Journal Article SR Electronic T1 Pneumococcal pneumonia after vaccination JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1204 OP 1204 VO 127 IS 12 A1 Amer, E. A1 Forward, K. A1 Guy, J. A1 Martin, J. YR 1982 UL http://www.cmaj.ca/content/127/12/1204.abstract