RT Journal Article SR Electronic T1 “Witchcraft, a fad or a racket?” Food allergy in historical perspective JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 64 OP 65 DO 10.1503/cmaj.150575 VO 188 IS 1 A1 Matthew Smith YR 2016 UL http://www.cmaj.ca/content/188/1/64.abstract AB