1. Division of Endocrinology and Metabolism, Department of Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota.
2. Division of Molecular Genetics, Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota.
3. Department of Surgery, Mayo Clinic College of Medicine, Rochester, Minnesota.
4. Department of Anatomic and Clinical Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota.