RT Journal Article SR Electronic T1 Penicillin allergy delabelling in pregnancy JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E452 OP E453 DO 10.1503/cmaj.220973 VO 195 IS 12 A1 Andrea Atkinson A1 Vanessa Poliquin A1 Chelsea Elwood YR 2023 UL http://www.cmaj.ca/content/195/12/E452.abstract