About the Authors

Brian France

bfrance@tda.com

Affiliation TDA Research Inc., Wheat Ridge, Colorado, United States of America

William Bell

Affiliation TDA Research Inc., Wheat Ridge, Colorado, United States of America

Emily Chang

Affiliation TDA Research Inc., Wheat Ridge, Colorado, United States of America

Trudy Scholten

Affiliation TDA Research Inc., Wheat Ridge, Colorado, United States of America

Competing Interests

All authors are employees of TDA Research Inc. The funding agency has been declared, this work was supported by the Defense Threat Reduction Agency (DTRA) under contract HDTRA1-12-C-0071. This does not alter the authors' adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: BF WB. Performed the experiments: EC TS. Analyzed the data: BF WB. Contributed reagents/materials/analysis tools: EC TS. Wrote the paper: BF WB.