1. The Graduate School of Clinical Health Sciences, Ewha Womans University, Seoul 120-750, Korea.
2. Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 120-750, Korea.
3. Department of Food and Nutritional Sciences, Hanbuk University, Dongducheon 483-777, Korea.
4. Department of Medicine, Cheil General Hospital & Women's Healthcare Center, Kwandong University College of Medicine, Seoul 110-138, Korea.