1 Department of Internal Medicine, Division of Nephrology and Hypertension, Iwate Medical University School of Medicine, Iwate, Japan.
2 Department of Internal Medicine, Division of Diabetes, Metabolism and Endocrinology, Iwate Medical University School of Medicine, Iwate, Japan.
3 Department of Internal Medicine, Division of Nephrology and Hypertension, Iwate Medical University School of Medicine, Iwate, Japan. yoshikaw@iwate-med.ac.jp.
4 Department of Internal Medicine, Morioka Tsunagi Onsen Hospital, Morioka, Japan.