1. Kyoritsu Seiyaku Corporation, 2-9-22 Takamihara, Tsukuba, Ibaraki 300-1252, Japan
2. Northern branch, Gyeonggi Northern Animal Hygiene Laboratory Office, Namyangju 12035, Republic of Korea
3. NH Foods Ltd., R&D Center, 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan
4. College of Veterinary Medicine KonKuk University, Seoul 05029, Republic of Korea