1. Battelle National Biodefense Institute for the US Department of Homeland Security, National Biodefense Analysis and Countermeasures Center, Frederick, MD, USA;
2. Center for Disease Imaging, Radiology, and Imaging Services, National Institutes of Health, Bethesda, MD, USA;
3. Clinical Research Directorate/Clinical Monitoring Research Program, Leidos Biomedical Research, Inc., NCI Campus at Frederick, Frederick, MD, USA;
4. Integrated Research Facility, National Institute of Allergy and Infectious Disease (NIAID), Frederick, MD, USA