1. Diabetes Center, Aizawa Hospital, Matsumoto, 390-8510, Japan
2. Department of Critical Care and Emergency Medicine, Aizawa Hospital, Matsumoto, 390-8510, Japan
3. Intensive Care Unit, Aizawa Hospital, Matsumoto, 390-8510, Japan
4. Department of Pharmacology, Oita University Faculty of Medicine, Oita, 879-5533, Japan
5. Department of Diabetes, Endocrinology and Metabolism, International University of Health and Welfare Shioya Hospital, Yaita, 329-2145, Japan