1. Department of Veterinary Internal Medicine, College of Veterinary Medicine; Chungnam National University; 99 Daehakro, Yuseoung gu Daejon 305-764 Republic of Korea
2. Department of Veterinary Internal Medicine, College of Veterinary Medicine; Seoul National University; 599 Gwanak-ro, Gwanak-gu Seoul 151-742 Republic of Korea
3. Department of Biological Science; Gachon University of Medicine and Science; 534-2 Yeonsu-dong, Yeonsu-gu Incheon 406-799 Republic of Korea
4. Research Institute for Veterinary Science, College of Veterinary Medicine; Seoul National University; 599 Gwanak-ro, Gwanak-gu Seoul 151-742 Republic of Korea