About the Authors

Margreet W. Harskamp-van Ginkel

Affiliation Department of Public Health, Academic Medical Center, P.O. Box 22660, 1100 DD Amsterdam, The Netherlands

Stephanie J. London

Affiliation Epidemiology Branch and Laboratory of Respiratory Biology, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, Durham, North Carolina, United States of America

Maria C. Magnus

Affiliation Department of Chronic Diseases, Division of Epidemiology, Norwegian Institute of Public Health, Oslo, Norway

Maaike G. Gademan

Affiliation Department of Public Health, Academic Medical Center, P.O. Box 22660, 1100 DD Amsterdam, The Netherlands

Tanja G. Vrijkotte

t.vrijkotte@amc.uva.nl

Affiliation Department of Public Health, Academic Medical Center, P.O. Box 22660, 1100 DD Amsterdam, The Netherlands

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: MHvG SJL MCM MGG. Analyzed the data: MHvG MCM MGG. Contributed reagents/materials/analysis tools: TGV. Wrote the paper: MHvG SJL MCM MGG TGV.