1. Division of Diabetes, Endocrinology, and Metabolism, Duke University Hospital, Durham, North Carolina.
2. Endocrinology Department, Wilmington Health Associates, Wilmington, North Carolina.
3. Department of Surgery, New Hanover Regional Medical Center, Wilmington, North Carolina.
4. Department of Pathology, New Hanover Regional Medical Center, Wilmington, North Carolina.
5. Department of Pathology, University of Wisconsin, Madison, Madison, Wisconsin.