About the Authors

Xuguang Guo

Affiliation Department of Health Studies, Westat Inc., Research Triangle Park, North Carolina, United States of America

Yikyung Park

Affiliation Nutritional Epidemiology Branch, National Cancer Institute, Rockville, Maryland, United States of America

Neal D. Freedman

Affiliation Nutritional Epidemiology Branch, National Cancer Institute, Rockville, Maryland, United States of America

Rashmi Sinha

Affiliation Nutritional Epidemiology Branch, National Cancer Institute, Rockville, Maryland, United States of America

Albert R. Hollenbeck

Affiliation AARP, Washington DC, United States of America

Aaron Blair

Affiliation Occupational and Environmental Epidemiology Branch, National Cancer Institute, Rockville, Maryland, United States of America

Honglei Chen

chenh2@niehs.nih.gov

Affiliation Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, United States of America

Competing Interests

The authors have the following interests. Dr. Guo works as a statistician for Westat Inc. Westat is a contract company that conducts data analysis for NIEHS. This does not alter their adherence to PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: HC YP NDF RS. Performed the experiments: XG HC YP NDF RS ARH AB. Analyzed the data: XG HC YP NDF. Contributed reagents/materials/analysis tools: YP NDF RS ARH AB. Wrote the paper: XG HC YP NDF.