A history of previous allergic reactions to one or more food substances from the selected list ( Almond, Apple, Banana, Beef, Carrot, Celery, Chocolate, Corn, Cow’s milk, Crab, Egg white, Lobster, Orange, Oyster, Peanut, Salmon, Shrimp, Soybean, String bean, Tomato, and Wheat) was considered as the primary important factor for the study.