1. Cooperative Department of Veterinary Medicine, Iwate University, Morioka, Iwate 020–8550, Japan
2. Center for Biotechnology, Agriculture and Forestry University, Rampur, Chitwan, Nepal
3. Atsumi Dairy Herds Management Service, Sendai, Miyagi 989–3205, Japan
4. Iwate Veterinary Hospital, Iwate-machi, Iwate 028–4307, Japan
5. United Graduate School of Veterinary Sciences, Gifu University, Gifu 501–1193, Japan
6. Ueki Veterinary Hospital, Morioka, Iwate 020–0887, Japan
7. Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki 889–2192, Japan
8. Department of Advanced Pathobiology, Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka 598–8531, Japan