RT Journal Article SR Electronic T1 Vaccination against human papillomavirus JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1526 OP 1527 DO 10.1503/cmaj.1070117 VO 177 IS 12 A1 Nisker, Jeff YR 2007 UL http://www.cmaj.ca/content/177/12/1526.2.abstract