1. Department of Internal Medicine I, Faculty of Medicine (K.H., Y.K., T.Y., H.Y.), Oita 879-5593, Japan
2. Department of Health Science Center (H.T.), Oita University, Oita 879-5593, Japan
3. Instituto Nacional de Diabetes, Endocrinología y Nutrición (J.A.H.B.), Fukuoka 814-0198, Japan
4. Universidad Technologica de Santiago (M.C.LL.), Fukuoka 814-0198, Japan
5. Universidad Autónoma de Santo Domingo (L.I.B.V.), Fukuoka 814-0198, Japan
6. Centro de Gastroenterologia (B.J.W.), Santo Domingo, Dominican Republic
7. Graduate School of Health and Nutritional Sciences, Nakamura Gakuen University (T.S.), Fukuoka 814-0198, Japan