RT Journal Article SR Electronic T1 Measles JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 450 OP 450 DO 10.1503/cmaj.130958 VO 186 IS 6 A1 Derek R. MacFadden A1 Wayne L. Gold YR 2014 UL http://www.cmaj.ca/content/186/6/450.abstract