1. Department of Medical Innovation, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya-shi, Aichi 467-8601, Japan
2. Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya-shi, Aichi 467-8601, Japan
3. Department of Diabetes and Endocrinology, Toyokawa City Hospital, 23 Noji, Yawata-cho, Toyokawa-shi, Aichi 442-8561, Japan
4. Department of Endocrinology and Diabetes, Nagoya City University West Medical Center, 1-1-1 Hirate-cho, Kita-ku, Nagoya-shi, Aichi 462-8508, Japan