1. Department of Endocrinology and Metabolism, Nagaoka Red Cross Hospital, Japan
2. Department of Endocrinology and Metabolism, Uonuma Institute of Community Medicine, Niigata University Medical and Dental Hospital, Japan
3. Department of Respiratory Medicine, Nagaoka Red Cross Hospital, Japan
4. Division of Clinical Research Sciences, Department of Medicine, Teikyo University Chiba Medical Center, Japan
5. Department of Family and Community Medicine, Hamamatsu University School of Medicine, Japan
6. Department of Internal Medicine, Ojiya General Hospital, Japan
7. Center of Diabetes, Endocrinology and Metabolism, Joetsu General Hospital, Japan