1. Department of Cancer Biology, Mayo Clinic College of Medicine, Jacksonville, Florida.
2. Division of Endocrinology, Mayo Clinic College of Medicine, Jacksonville, Florida.
3. Division of Endocrinology, Department of Medicine, Mayo Clinic College of Medicine, Rochester, Minnesota.
4. Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota.
5. Division of Oncology, Mayo Clinic College of Medicine, Jacksonville, Florida.
6. Center for Medicine Endocrinology and Diabetes, Atlanta, Georgia.