1. Department of Pediatric Surgery, Kurume University School of Medicine, Kurume, Fukuoka 830‑0011, Japan
2. Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume, Fukuoka 830‑0011, Japan
3. Division of Diabetes, Metabolism and Endocrinology, Department of Medicine, Showa University School of Medicine, Tokyo 142‑8666, Japan