1. Department of Preventive Medicine and Biometrics, Uniformed Services University, Bethesda, Maryland.
2. Department of Neurology, Uniformed Services University, Bethesda, Maryland.
3. Metabolic Unit, Department of Clinical Chemistry, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, the Netherlands.
4. Bayne-Jones Army Community Hospital, Department of Preventive Medicine, Fort Polk, Louisiana.
5. Defense and Veterans Brain Injury Center, Washington, D.C.