1. Department of Veterans Affairs Medical Center Baltimore and Department of MedicineUniversity of Maryland School of MedicineBaltimore Maryland
2. Department of OrthopaedicsWalter Reed National Military Medical CenterBethesda Maryland
3. Department of Environmental and Occupational Health, Environmental and Occupational Health Sciences InstituteRutgers Robert Wood Johnson Medical SchoolPiscataway New Jersey
4. Department of Microbiology and Environmental ToxicologyUniversity of CaliforniaSanta Cruz California
5. Department of RadiologyBaltimore Veterans Affairs Medical CenterBaltimore Maryland