1. Department of Veterinary Internal Medicine, College of Veterinary Medicine and BK21 FOUR Program for Creative Veterinary Science Research Center, Chonnam National University, Gwangju 61186, Korea
2. Jeollanamdo Agricultural Research & Extension Service (Livestock Research Institute), Gangjin 59213, Korea
3. Jeollanamdo Veterinary Service Laboratory, Gangjin 59213, Korea
4. Veterinary Drugs & Biologics Division, Animal and Plant Quarantine Agency, Gimcheon 39660, Korea