1. Mayo Medical School, Mayo Clinic College of Medicine, Rochester, Minnesota, United States
2. Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, United States
3. Department of Neurologic Surgery, Mayo Clinic, Rochester, Minnesota, United States
4. Division of Anatomic Pathology, Mayo Clinic, Rochester, Minnesota, United States
5. Department of Otorhinolaryngology – Head and Neck Surgery, Mayo Clinic, Rochester, Minnesota, United States
6. Department of Radiation Oncology, Mayo Clinic, Rochester, Minnesota, United States