1. From the Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
2. Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota
3. Patient Recruitment Department, Altea Research Institute, Las Vegas, Nevada
4. Department of Pathology, University of New Mexico, Albuquerque, New Mexico
5. Department of Anatomical Pathology, King Fahad Medical City, King Saud bin Abdulaziz University, Riyadh, Saudi Arabia
6. Department of Pathology, North Valley Hospital, Kalispell, Montana
7. Department of Pathology and Laboratory Medicine, Allina Health Laboratories, Minneapolis, Minnesota
8. Department of Neurosurgery, Boone Hospital Center, Columbia, Missouri
9. Boyce and Bynum Pathology Laboratories, Columbia, Missouri
10. Department of Laboratory Medicine and Pathology, Mayo Clinic, Jacksonville, Florida