1. Diabetes Center, Aizawa Hospital, Matsumoto 390-8510, Japan
2. Department of Internal Medicine, Hokuriku Central Hospital, Oyabe 932-8503, Japan
3. Department of Medicine, Kamiichi General Hospital, Kamiichi 930-0391, Japan
4. Health Center, Aizawa Hospital, Matsumoto 390-8510, Japan
5. Central Clinical Laboratory, Aizawa Hospital, Matsumoto 390-8510, Japan
6. Nutrition Center, Aizawa Hospital, Matsumoto 390-8510, Japan