1. Laboratory of Molecular Morphology, Department of Animal Science, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo 657–8501, Japan
2. Laboratory of Microbiology and Immunology, Department of Animal Science, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo 657–8501, Japan
3. Laboratory of Food and Nutritional Chemistry, Department of Agrobioscience, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo 657–8501, Japan
4. Department of Pharmacology, Kyoto University Graduate School of Medicine, Kyoto, Kyoto 606–8501, Japan
5. Department of Biochemistry and Molecular Biology, Graduate School of Medicine, Kobe University, Kobe, Hyogo, 650–0017, Japan
6. Laboratory of Histophysiology, Department of Animal Science, Graduate School of Agricultural Science, Kobe University, Kobe, Hyogo 657–8501, Japan