1. Department of Health Management, Koshien University, Graduate School of Nutrition, Takarazuka, Hyogo, 665-0006 Japan
2. Department of Internal Medicine, Itami City Hospital, Itami, Hyogo, 664-8540 Japan
3. Biological Science Laboratories, Kao Corporation, Ichikai-machi, Haga-gun, Tochigi, 321-3497 Japan