All children underwent SPTs with commercial extracts of egg yolk, egg white (ALK-Abello), cow’s milk, alpha-lactalbumin, beta-lactoglobulin, and casein (Lofarma). Furthermore, patients were skin prick tested with 1 mg/ml histamine and control solution. The wheal reactions were read after 15 min. Tests were considered positive when the wheal size was ≥3 mm in diameter in comparison with the negative control. The parents were asked to withhold antihistamine medications at least 72 hrs before, and 2–3 weeks before the skin test and topical steroid (14).