1. Department of Food and Nutrition, Seoul National University, Seoul 151-742, Korea.
2. Biomedical Research center, Bundang Jaesang Hospital, Seongnam 463-050, Korea.
3. Division of Gastroenterology, Biomedical Research center, Bundang Jaesang Hospital, Seongnam 463-050, Korea.
4. Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI 48824, USA.
5. Department of Agrofood Resources, Rural Development Administration, 160, Nokjiro, Gwonseon-gu, Suwon, 441-853, Korea.
6. Graduate School of Public Health & Institute of Health and Environment, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea.