1. Department of Basic Veterinary Science, The United Graduate School of Veterinary Sciences, Gifu University, Gifu 501-1193, Japan
2. Laboratory of Veterinary Physiology, Cooperative Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
3. Pre Clinic Department, Faculty of Veterinary Science, Kabul University, Kabul, Afghanistan
4. Laboratory of Veterinary Physiology, Department of Veterinary Medicine, Faculty of Agriculture, Tokyo University of Agriculture and Technology, Tokyo 183-8509, Japan
5. Department of Theriogenology, Faculty of Veterinary Medicine, Benha University, Qaliobia, Egypt
6. College of Biological Science and Technology, Beijing Forestry University, Beijing 100083, China