1. Department of Nutritional Science and Food Management, Ewha Womans University, 52, Ewhayeodae-gil, Seodaemun-gu, Seoul 120-750, Korea.
2. Jeju Sasa Industry Development Agency, Jeju National University, Jeju 690-756, Korea.
3. Department of Biology, Jeju National University, Jeju 690-756, Korea.