About the Authors
- Seung-Sup Kim
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* E-mail: sskim@gwu.edu
Affiliation Department of Environmental and Occupational Health, The George Washington University School of Public Health and Health Services, Washington, D.C., United States of America
- David R. Williams
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Affiliation Department of Society, Human Development, and Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: S-SK DW. Analyzed the data: S-SK. Contributed reagents/materials/analysis tools: S-SK. Wrote the paper: S-SK DW.