1. Department
of Laboratory Animal Medicine, College of Veterinary Medicine, Chonbuk National University, Jeonju, Jeonbuk 561-156, Republic of Korea
2. Gwangju
Regional Food and Drug Administration, Ministry of Food and Drug Safety, Gwangju, Jeonnam 500-480, Republic of Korea
3. Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup, Jeonbuk 580-185, Republic of Korea