1. Department of Foods and Nutrition, College of Natural Sciences, Kookmin University, 77 Jeongneung-ro, Seongbuk-gu, Seoul 136-702, Korea.
2. Department of Food and Nutrition, Research Institute of Obesity Sciences, Sungshin Women's University, Seoul 142-100, Korea.
3. Department of Internal Medicine, Korea University Ansan Hospital, Ansan 425-707, Korea.