About the Authors

Sarah E. Staggs

Affiliation National Exposure Research Laboratory, US Environmental Protection Agency, Cincinnati, Ohio, United States of America

Erin M. Beckman

Affiliation Dynamac Corporation, Cincinnati, Ohio, United States of America

Scott P. Keely

Affiliation National Exposure Research Laboratory, US Environmental Protection Agency, Cincinnati, Ohio, United States of America

Reena Mackwan

Affiliation Dynamac Corporation, Cincinnati, Ohio, United States of America

Michael W. Ware

Affiliation National Exposure Research Laboratory, US Environmental Protection Agency, Cincinnati, Ohio, United States of America

Alan P. Moyer

Affiliation Department of Biological Sciences, McMicken School of Arts and Sciences, University of Cincinnati, Cincinnati, Ohio, United States of America

James A. Ferretti

Affiliation Region 2, US Environmental Protection Agency, Edison, New Jersey, United States of America

Abu Sayed

Affiliation Dynamac Corporation, Cincinnati, Ohio, United States of America

Lihua Xiao

Affiliation Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Eric N. Villegas

villegas.eric@epa.gov

Affiliations National Exposure Research Laboratory, US Environmental Protection Agency, Cincinnati, Ohio, United States of America, Department of Biological Sciences, McMicken School of Arts and Sciences, University of Cincinnati, Cincinnati, Ohio, United States of America

Competing Interests

The co-authors Erin Beckman, Reena Mackwan and Abu Sayed were employees of Dynamac Corporation. This does not alter the authors’ adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: SES AS SPK RM ENV. Performed the experiments: SES EMB RM MWW APM SPK. Analyzed the data: SES EMB SPK AS ENV. Contributed reagents/materials/analysis tools: JAF LX. Wrote the paper: SES ENV EMB SPK.