1. Miyagi University, Hatadate, Taihaku-ku, Sendai, Miyagi 982-0215, Japan
2. RIKEN, Benno Laboratory, Hirosawa, Wako, Saitama 351-0198, Japan
3. Biofermin Kobe Research Institute, Kobe, Hyogo 651-242, Japan
4. Yokohama Rosai Hospital, JLHWO, Kozukue-cho, Kohoku-ku, Yokohama 222-0036, Japan
5. Fujicco Co., Ltd, Japan
6. Research Laboratory, Matsutani Chemical Industry Co., Ltd., Japan
7. Dairy Science and Technology Institute, Kyodo Milk Industry Co., Ltd., Japan
8. Research Laboratory, Toa Pharmaceutical Co., Ltd., Japan
9. Yakult Central Institute for Microbiological Research, Japan