1. Microbiology and Immunology Section, Department of Clinical Nutrition, Graduate School of Health Science, Suzuka University of Medical Science, Suzuka, Mie, Japan.
2. Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, Mie, Japan.
3. Department of Clinical Nutrition, Faculty of Health Science, Suzuka University of Medical Science, Suzuka, Mie, Japan.
4. Department of Microbiology, Mie University Graduate School of Medicine, Tsu, Mie, Japan.
5. Graduate School of Mie Prefectural College of Nursing, Tsu, Mie, Japan.