1. Department of Food Hygiene, Nippon Veterinary and Animal Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180, Japan
2. Laboratory of Nutritional Assessment of Food Division of Applied Research, The National Institute of Health and Nutrition, Toyama 1-23-1, Shinjuku-ku, Tokyo, 162, Japan
3. Development Department, Speciality Chemicals Division, Pharmaceuticals Group, Nippon Kayaku Co, Ltd, Tokyo Kaijo Bldg. 2-1, Marunouchi, 1-Chome, Chiyoda-ku, Tokyo, 100, japan
4. Bioscience Research Laboratory, Katokichi Co, Ltd, 4-2-35 Sanbonmatsu-cho, Kannonji, Kagawa, 768, Japan
5. Joto Kousei Hospital, 5-13-15 Nakakasai, Edogawa-ku, Tokyo, 134, Japan