Second Department of Internal Medicine, Division of Endocrinology, Diabetes and Metabolism, Hematology and Rheumatology, Graduate School of Medicine, University of the Ryukyus

Center for Diabetes, Endocrinology and Metabolism, and Center for Metabolism and Clinical Nutrition, Kansai Electric Power Hospital

Division of Clinical Trials, the Institute for Adult Diseases, Asahi Life Foundation

Endocrinology and Diabetes Center, Yokohama Rosai Hospital

Division of Metabolism and Endocrinology, Faculty of Medicine, Saga University