allergic disease
   |__gastrointestinal allergy
       |__food allergy
           |__egg allergy
           |   |__chicken egg allergy
           |__fish allergy
           |   |__Atlantic cod allergy
           |   |__Atlantic salmon allergy
           |   |__carp allergy
           |   |__rainbow trout allergy
           |   |__zebrafish allergy
           |__fruit allergy
           |   |__apple allergy
           |   |__apricot allergy
           |   |__cherry allergy
           |   |__Indian plum allergy
           |   |__legume allergy(+)
           |   |__melon allergy
           |   |__orange allergy
           |   |__peach allergy
           |   |__plum allergy
           |   |__tomato allergy
           |__gluten allergy
           |__milk allergy
           |   |__cow milk allergy
           |   |__goat milk allergy
           |__nut allergy
           |__shellfish allergy
           |   |__crustacean allergy(+)
           |   |__mollusc allergy(+)
           |__vegetable allergy
           |   |__celery allergy
           |   |__dill allergy
           |   |__parsley allergy
           |__wheat allergy