1. Department of Bacterial Infections, Research Institute for Microbial Diseases, Osaka University,1 and
2. Department of Microbiology, Miyazaki Medical College, Kiyotake, Miyazaki,2
3. Genome Information Research Center, Osaka University, Suita, Osaka,3
4. Department of Nutrition, School of Medicine, Tokushima University, Tokushima, Tokushima,4 and
5. Osaka Prefectural Institute of Public Health, Osaka,5 Japan