1 Department of Radiology and Radiological Science.
2 Department of Public Health.
3 Department of Otolaryngology - Head and Neck Surgery.
4 Department of Radiology and Radiological ScienceMedical University of South CarolinaCharleston, South Carolina.
5 Neurosciences LaboratoryNASA Johnson Space CenterHouston, Texas.
6 Department of Psychiatry and Behavioral SciencesMedical University of South CarolinaCharleston, South CarolinaRalph H. Johnson VA Medical CenterCharleston, South Carolina.