1. Graduate School of Human Life Science, Osaka City University, Sumiyoshi, Osaka 558-8585, Japan
2. Faculty of Human Life Science, Shikoku University, Tokushima 771-1192, Japan
3. Technical Research and Development Institute, Ajinomoto AGF, Inc., Sanken Building, 3-25-1, Hyakunin-cho Shinjuku-ku, Tokyo 169-0073, Japan