1. From the Diabetes and Metabolism Research Unit, Department of Medicine and Section of Endocrinology, and the 2Department of Pathology and Laboratory Medicine, Boston University School of Medicine, Boston, Massachusetts; and
2. From the Diabetes and Metabolism Research Unit, Department of Medicine and Section of Endocrinology, and
3. From the Diabetes and Metabolism Research Unit, Department of Medicine and Section of Endocrinology, and the 3Department of Pathology, Hirosaki University School of Medicine, Hirosaki, Japan.