1. Department of Foods and Nutrition, Kookmin University, 861-1, Chongneung-dong, Sungbuk-gu, Seoul 136-702, Korea.
2. Premedical course, College of Medicine, Dankook University, Cheonan 330-714, Korea.
3. Department of Functional Food and Nutrition Division, Rural National Academy of Agricultural Science, Suwon 441-707, Korea.