1. Department of Biomedical Laboratory Science, College of Biomedical Sciences, Soonchunhyang University, Asan, Korea.
2. Life Science Research Institute, Unigen Inc., Cheonan, Korea.
3. Department of Laboratory Animal Research, Central Research Institute, Dr. Chung's Food Co. Ltd., Cheongju, Korea.
4. Department of Anatomy and Cell Biology, College of Veterinary Medicine and Research Institute for Veterinary Science, Seoul National University, Seoul, Korea.