1. Division of Applied Life Science, Gyeongsang National University, Jinju 660-701, Korea.
2. Department of Animal Science & Technology, Sunchon National University, Suncheon 540-742, Korea.
3. College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Korea.
4. Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 660-701, Korea.