TY - JOUR T1 - Letter: Hyperactivity, allergy and megavitamins JF - Canadian Medical Association Journal JO - CMAJ SP - 905 LP - 905 VL - 111 IS - 9 AU - A. Hoffer Y1 - 1974/11/02 UR - http://www.cmaj.ca/content/111/9/905.abstract ER -