1. Department of Agrobioscience, Graduate School of Agricultural
Science, Kobe University, 1-1 Rokkodai-cho,
Nada-ku, Kobe, Hyogo 657-8501, Japan
2. Division of Gastroenterology, Department
of Internal Medicine, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe,
Hyogo 657-0017, Japan
3. Department of Environmental
Science, Niigata Institute of Technology, 1719 Fujihashi, Kashiwazaki, Niigata 945-1195, Japan