1. Mitoyo General Hospital, Takamatsu, Kagawa 769-1695, Japan
2. Clinico Co., Ltd., Tokyo 153-0063, Japan
3. Next Generation Science Institute, Morinaga Milk Industry Co., Ltd., Kanagawa 252-8583, Japan
4. Food Ingredients and Technology Institute, Morinaga Milk Industry Co., Ltd., Kanagawa 252-8583, Japan