1. Cooperative Department of Veterinary Medicine, Iwate University, Morioka, Iwate, 020–8550, Japan
2. United Graduate School of Veterinary Sciences, Gifu University, Gifu, Gifu, 501–1193, Japan
3. Agriculture and Forestry University, Rampur, Chitwan, 44209, Nepal
4. Field Science Center, Faculty of Agriculture, Iwate University, Shizukuishi, Iwate 020–0581, Japan