1. Laboratory of Veterinary Physiology, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa, Kanagawa 252-0880, Japan
2. Department of Animal Science, Teikyo University of Science, 2-2-1 Senjusakuragi, Adachi-ku, Tokyo 120-0045, Japan
3. Pharma Foods International Co., LTD, 1-49 Goryo-Ohara, Nishikyo-ku, Kyoto 615-8245, Japan