RT Journal Article SR Electronic T1 Vaccine allergy JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E395 OP E395 DO 10.1503/cmaj.190208 VO 191 IS 14 A1 Derek K. Chu A1 Zainab Abdurrahman YR 2019 UL http://www.cmaj.ca/content/191/14/E395.abstract