RT Journal Article SR Electronic T1 Testimonials for vaccine-preventable illnesses JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1175 OP 1175 DO 10.1503/cmaj.1080114 VO 179 IS 11 A1 Cornelius Woelk MD YR 2008 UL http://www.cmaj.ca/content/179/11/1175.1.abstract