1. Department of Food Science and Nutrition, Andong National University, Andong, Gyeongpook 760-749, Korea.
2. Central Laboratory Division for Instrumental Analysis, Kyungbook National University, Daegu 702-701, Korea.
3. School of Dentistry, Kyungbook National University, Daegu 702-701, Korea.
4. Cellular Integrity Division, Rowett Research Institute, Aberdeen, Scotland, United Kingdom.