As well, a limited medical history and medication history will be documented, with a focus on atopic disorders (i.e. atopic dermatitis (eczema), allergic rhinitis, asthma, and food allergy). Those in the non-allergic control group will be excluded if they have features of eczema, food allergy or other atopic conditions). Medications that could potentially interfere with the skin test results (i.e. antihistamines) must be documented, and appropriate washout intervals observed prior to the skin test procedure, if necessary.