1. Departments of Pathology and Laboratory Medicine, Mayo Clinic, Rochester, Minnesota; Department of Pathology, Gulhane Military Medical Academy, Ankara, Turkey
2. Departments of Pathology and Laboratory Medicine, Mayo Clinic, Rochester, Minnesota; Institute of Neurological Sciences, Ankara, Turkey
3. Departments of Pathology and Laboratory Medicine, Mayo Clinic, Rochester, Minnesota
4. Diagnostic Radiology, Mayo Clinic, Rochester, Minnesota
5. Department of Pathology, Johns Hopkins Hospital, Baltimore, Maryland
6. Departments of Pathology and Cytopathology, Waukesha Memorial Hospital, Waukesha, Wisconsin
7. Department of Otorhinolaryngology, Waukesha Memorial Hospital, Waukesha, Wisconsin