1. The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
2. Division of Bacterial, Parasitic, and Allergenic Products, Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, USA
3. Joint Program Executive Office for Chemical, Biological, Radiological and Nuclear Defense (JPEO-CBRND), Joint Project Lead for CBRND Enabling Biotechnologies, Frederick, Maryland, USA
4. Joint Research and Development, Inc., Stafford, Virginia, USA