1. Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ, UK
2. United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Frederick, MD 21702, USA
3. Institute for Therapeutic Innovation, University of Florida, Orlando, FL 32827, USA
4. Battelle Memorial Institute, Columbus, OH 43201, USA
5. Parsons Corporation, Centerville, VA 20120, USA
6. Defense Threat Reduction Agency, Fort Belvoir, VA 22060, USA
7. School of Respiratory Sciences, University of Leicester, Leicester LE1 7RH, UK