1. Department of Food and Nutrition, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea.
2. Department of Food and Nutrition, Seojeong College, Yangju 482-777, Korea.
3. Division of Allergy and Clinical Immunology, Department of Pediatrics, Chungnam National University Hospital, Daejeon 301-721, Korea.