1. Department of Food and Nutrition, Yonsei University, 262 Seongsanno, Seodaemun-gu, Seoul 120-749, Republic of Korea
2. Department of Food and Nutrition, Sookmyung Women's University, 52 Hyochangwon-gil, Yongsan-gu, Seoul 140-742, Republic of Korea
3. Department of Food Science, College of Life Sciences and Biotechnology, Korea University, 1, 5-ga, Anam-dong, Sungbuk-ku, Seoul 136-701, Republic of Korea