TY - JOUR T1 - Penicillin allergy JF - Canadian Medical Association Journal JO - CMAJ SP - E231 LP - E231 DO - 10.1503/cmaj.181117 VL - 191 IS - 8 AU - David J. McCullagh AU - Derek K. Chu Y1 - 2019/02/25 UR - http://www.cmaj.ca/content/191/8/E231.abstract ER -