1. Analytical Technology Laboratory, Asahi Breweries, Ltd., 1-1-21 Midori, Moriya, Ibaraki 302-0106, Japan, Center for Food Quality, Labeling and Consumer Services, 2-1 Shintoshin, Chuo-ku, Saitama-shi, Saitama 330-9731, Japan, National Food Research Institute, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan, Nisshin Seifun Group Inc., 5-3-1 Tsurugaoka, Oi-machi, Iruma-gun, Saitama 356-8511, Japan, and National Institute of Health Sciences, 1-18-1 Kamiyoga, Setagaya-ku, Tokyo 158-8501, Japan