1. Technical Research Laboratory; Takanashi Milk Products Co., Ltd.; Yokohama Kanagawa 241-0023 Japan
2. Department of Biochemistry and Food Chemistry; University of Turku; Fin-20014 Turku Finland
3. National Institute of Agrobiological Sciences; Tsukuba; Ibaraki 305-8602 Japan
4. Department of Pediatrics; Turku University Hospital; Fin-20520 Turku Finland
5. Japan Collection of Microorganisms (JCM); RIKEN; Wako Saitama 351-0198 Japan