About the Authors

Duk-Hee Lee

Affiliation Department of Preventative Medicine, School of Medicine, Kyungpook National University, Daegu, Korea

Michael W. Steffes

Affiliation Department of Laboratory Medicine and Pathology, School of Medicine, University of Minnesota, Minneapolis, Minnesota

Andreas Sjödin

Affiliation Organic Analytical Toxicology Branch (OAT), Division of Laboratory Sciences (DLS), National Center for Environmental Health (NCEH), Centers for Disease Control and Prevention (CDC), Atlanta, Georgia, United States of America

Richard S. Jones

Affiliation Organic Analytical Toxicology Branch (OAT), Division of Laboratory Sciences (DLS), National Center for Environmental Health (NCEH), Centers for Disease Control and Prevention (CDC), Atlanta, Georgia, United States of America

Larry L. Needham

† Deceased.

Affiliation Organic Analytical Toxicology Branch (OAT), Division of Laboratory Sciences (DLS), National Center for Environmental Health (NCEH), Centers for Disease Control and Prevention (CDC), Atlanta, Georgia, United States of America

David R. Jacobs Jr

jacob004@umn.edu

Affiliations Division of Epidemiology, School of Public Health, University of Minnesota, Minneapolis, Minnesota, Department of Nutrition, University of Oslo, Oslo, Norway

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DHL MWS DRJ. Performed the experiments: AS RSJ LLN. Analyzed the data: DHL DRJ. Contributed reagents/materials/analysis tools: AS RSJ LLN. Wrote the paper: DHL MWS DRJ.