Allergy to food and chemicals--1. The scope of the problem.
D000222:Adaptation, Physiological; D004342:Drug Hypersensitivity / Q000175:diagnosis / Q000503:physiopathology; D004463:Ecology; D005512:Food Hypersensitivity / Q000175:diagnosis / Q000503:physiopathology; D006801:Humans; D008487:Medical History Taking