1. Epidemiological Surveillance Division, Molecular Epidemiology Branch, Air Force Institute for Environment, Safety, and Occupational Health Risk Analysis, Brooks Air Force Base, San Antonio. TX 78235-5237
2. Molecular Epidemiology, AFIERA. 2730 Louis Bauer Drive. Building 930, Brooks Air Force Base. San Antonio, TX 78235-5237
3. United States Air Force Academy, Colorado Springs, Colorado