1. Laboratory of Veterinary Physiology, School of Veterinary Medicine, Kitasato University, Aomori, Japan
2. Laboratory of Veterinary Anatomy, School of Veterinary Medicine, Kitasato University, Aomori, Japan
3. Laboratory of Veterinary Physiology, Cooperative Department of Veterinary Medicine, Iwate University, Iwate, Japan
4. Laboratory of Veterinary Physiology, School of Veterinary Medicine, Okayama University of Science, Ehime, Japan