1. Aeromedical Research Department; U.S. Air Force School of Aerospace Medicine; Wright-Patterson AFB; Dayton OH USA
2. Department of Neurology; 59 Medical Wing; Joint Base San Antonio-Lackland; San Antonio TX USA
3. Department of Neuroradiology; 59 Medical Wing; Joint Base San Antonio-Lackland; San Antonio TX USA
4. Maryland Psychiatric Research Center; University of Maryland School of Medicine; Baltimore MD USA