About the Authors

James E. McGuffey

jem4@cdc.gov

Affiliation Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Binnian Wei

Affiliation Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

John T. Bernert

Affiliation Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

John C. Morrow

Affiliation Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Baoyun Xia

Affiliation Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Lanqing Wang

Affiliation Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Benjamin C. Blount

Affiliation Tobacco and Volatiles Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JEM BW JTB JCM LW BCB. Performed the experiments: JEM BW JTB JCM BX LW BCB. Analyzed the data: JEM BW JTB JCM BX LW BCB. Contributed reagents/materials/analysis tools: JEM BW JTB JCM BX LW BCB. Contributed to the writing of the manuscript: JEM BW JTB JCM BX LW BCB.