1. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, Maryland;
2. United States Army Research Institute of Environmental Medicine, Military Performance Division, Natick, Massashusetts;
3. Boston University School of Public Health, Department of Environmental Health, Boston, Massachusetts;
4. United States Army Research Institute of Environmental Medicine, Thermal and Mountain Medicine Division, Natick, Massachusetts;
5. Centers for Disease Control and Prevention, National Center for Environmental Health, Division of Laboratory Sciences, Atlanta, Georgia;
6. VA Boston Healthcare System, Research Service, Boston, Massachusetts