1. Department of Otolaryngology-Head and Neck Surgery; University of Texas Southwestern Medical Center; Dallas TX
2. Department of Radiology; University of Texas Southwestern Medical Center; Dallas TX
3. University of Texas Southwestern Medical School; Dallas TX
4. Department of Otorhinolaryngology-Head and Neck Surgery; Rush University Medical Center; Chicago IL
5. Rush Center for Skull Base and Pituitary Surgery; Rush University Medical Center; Chicago IL