1. Department of Veterinary Physiology, College of Veterinary Medicine, Biotherapy Human Resources Center (BK21), Chonnam National University, Gwangju 500-757, Korea.
2. Department of Diagnostic Radiology, College of Medicine, Chosun University Hospital, Gwangju 501-759, Korea.
3. Department of Surgery, College of Medicine, Chosun University Hospital, Gwangju 501-759, Korea.
4. College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Korea.