1. Department of Veterinary Pharmacology; Graduate School of Agriculture and Life Sciences; The University of Tokyo; Tokyo Japan
2. Development of Advanced Technology Laboratory Research Center for Food Safety; The University of Tokyo; Tokyo Japan
3. Department of Anatomy; Faculty of Medical Sciences; University of Fukui; Fukui Japan
4. Department of Anatomy; Jikei University School of Medicine; Tokyo Japan
5. Yakult Central Institute for Microbiological Research; Tokyo Japan