1. College of Veterinary Medicine and Research Institute of Veterinary Medicine, Chungbuk National University, Cheongju 361-763, Korea.
2. Division of Marine Molecular Biotechnology, Gangneung-Wonju National University, Gangneung 210-702, Korea.
3. Institute of Life Science Research, Rexgene Biotech, Cheongweon 361-763, Korea.
4. College of Pharmacy, Chungbuk National University, Cheongju 361-763, Korea.
5. Department of Medicine, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada.