RT Journal Article SR Electronic T1 Influenza vaccine for all? JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1162 OP 1163 DO 10.1503/cmaj.1050066 VO 172 IS 9 A1 Joanne M. Langley A1 John Feightner YR 2005 UL http://www.cmaj.ca/content/172/9/1162.abstract