1. Division of Pharmacology; Osaka University of Pharmaceutical Sciences; Takatsuki Osaka 569-1094 Japan
2. Division of Food Microbiology; Osaka Prefectural Institute of Public Health; Osaka Osaka 537-0025 Japan
3. Department of Molecular Microbiology; Gifu Prefectural Institute for Bio-industrial Technology; Minokamo Gifu 505-0004 Japan
4. Department of Food Science and Technology, Faculty of Bioindustry; Tokyo University of Agriculture; Abashiri Hokkaido 099-2493 Japan