1. R&D Center, Nippon Meat Packers, Inc., 3-3 Midorigahara, Tsukuba, Ibaraki 300-2646, Japan; National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan; The Second Teaching Hospital, Fujita Health University, 3-6-10 Otobashi, Nakagawa-ku, Nagoya 454-8509, Japan; Kinki University, 3327-204 Nakamachi, Nara, Nara 631-8505, Japan; and Kansai University of Welfare Sciences, 3-1-11 Asahigaoka, Kashiwabara, Osaka 582-0026, Japan