RT Journal Article SR Electronic T1 Human papillomavirus vaccine risk and reality JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 503 OP 503 DO 10.1503/cmaj.081238 VO 179 IS 6 A1 Noni MacDonald, MD MSc A1 Matthew B. Stanbrook, MD PhD A1 Paul C. Hébert, MD MHSc YR 2008 UL http://www.cmaj.ca/content/179/6/503.abstract