1. Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
2. Department of Pathology, St. Michael's Hospital, Toronto, Ontario, Canada
3. Department of Pathology, Anadolu Foundation Health Care System, Kocaeli, Turkey
4. Department of Endocrinology, Mayo Clinic, Rochester, Minnesota
5. Department of Neurosurgery, Mayo Clinic, Rochester, Minnesota
6. Department of Pathology, Toho University School of Medicine, Tokyo, Japan
7. Department of Neurosurgery, University of Virginia, Charlottesville, Virginia