1. Mayo Medical School; Mayo Clinic College of Medicine; Rochester Minnesota U.S.A.
2. Department of Radiology; Mayo Clinic; Scottsdale Arizona
3. Division of Anatomic Pathology; Mayo Clinic; Scottsdale Arizona
4. Division of Infectious Diseases; Mayo Clinic Hospital; Phoenix Arizona
5. Division of Otolaryngology-Head and Neck Surgery; Mayo Clinic Hospital; Phoenix Arizona