1 Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan. obata-tky@med.kawasaki-m.ac.jp.
2 Department of Neurology, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan.
3 Department of Diabetes, Endocrinology and Metabolism, Kawasaki Medical School, 577 Matsushima, Kurashiki, 701-0192, Japan.