1. Food and Health R&D Laboratories, Meiji Seika Kaisha, Ltd., 5-3-1, Chiyoda, Sakado-shi, Saitama 350-0289, Japan, Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, 265-1, Higashijima, Niigata-shi, Niigata 956-8603, Japan, and Research Center for Biomarkers of Preventive Medicine, Doshisha University, Imadegawa-dori, Kamigyo-ku, Kyoto, 602-8580, Japan