Skin Prick Test
Skin prick tests(SPT) were performed all study group. It was performed on the volar aspect of the forearm. Common inhaled allergens(house dust mites, cockroach, animal danders, fungi and mixed grass and tree pollens) were allergens. All SPTs were performed using commercial extracts (Laboratoire Stallergenes, France). Temoline was used as negative control and histamine(10 mg/ml) as positive control. Reaction was evaluated 15-20 minutes after allergens were applied. Test result was defined as positive if the wheal diameter of test was at least 3 mm greater than that of the negative control.16