1. Division of Applied Biosciences, Graduate School of Agriculture; Kyoto University; Kyoto Japan
2. Milk Science Research Institute; Megmilk Snow Brand Co, Ltd; Kawagoe Japan
3. Laboratory of Experimental Animal Science; Kitasato University School of Veterinary Medicine; Towada Japan
4. Division of Food Science and Biotechnology; Kyoto University Graduate School of Agriculture; Kyoto Japan