1. Department of Food & Nutrition, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Korea.
2. Department of Health Promotion Center, Asan Medical Center, 388-1 Pungnap-2 dong, Songpa-gu, Seoul, 138-736, Korea.
3. Department of Internal Medicine, College of Medicine, Hanyang University Hospital, 17 Haengdang-dong, Seongdong-gu, Seoul 133-792, Korea.