1. School of Veterinary Medicine, Mongolian University of Life Sciences, Ulaanbaatar 17024, Mongolia
2. Department of Endocrine Pharmacology, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
3. Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
4. Research Institute of Agriculture, Tokai University, Kumamoto 862-8652, Japan