1. Division of Endocrinology, Diabetes and Metabolism, Hematology, Rheumatology (Second Department of Internal Medicine), Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
2. Okinawa Shokuryo K.K., Okinawa, Japan
3. Diabetes and Life-style Related Disease Center, Tomishiro Central Hospital, Okinawa, Japan
4. Tanaka Clinic, Okinawa, Japan
5. Departments of Molecular Anatomy, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
6. Department of Molecular and Cellular Physiology, Graduate School of Medicine, University of the Ryukyus, Okinawa, Japan
7. Institute for Genome Research, University of Tokushima, Tokushima, Japan
8. Department of Cardio-Diabetes Medicine, University of Tokushima Graduate School of Health Biosciences, Tokushima, Japan