Author Contributions: Dr Grandjean had full access to all of the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis.
Study concept and design: Grandjean, Weihe, Heilmann.
Analysis and interpretation of data: Grandjean, Andersen, Budtz-Jørgensen, Nielsen, Mølbak, Weihe, Heilmann.
Drafting of the manuscript: Grandjean.
Critical revision of the manuscript for important intellectual content: Grandjean, Andersen, Budtz-Jørgensen, Nielsen, Mølbak, Weihe, Heilmann.
Statistical analysis: Grandjean, Andersen, Budtz-Jørgensen.
Administrative, technical, or material support: Nielsen, Mølbak, Weihe.
Study supervision: Grandjean, Weihe, Heilmann.
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest. Dr Mølbak reported that he is employed as a civil servant at the government-owned Statens Serum Institut, which manufactures and markets vaccines in Denmark and other countries. No other authors reported disclosures.
Funding/Support: This study was supported by the National Institute of Environmental Health Sciences, NIH (ES012199); the US Environmental Protection Agency (R830758); the Danish Council for Strategic Research (09-063094); and the Danish Environmental Protection Agency as part of the environmental support program DANCEA (Danish Cooperation for Environment in the Arctic).
Role of the Sponsors: The study sponsors had no role in the design and conduct of the study; the collection, analysis, and interpretation of the data; or the preparation, review, or approval of the manuscript.
Disclaimer: The authors are solely responsible for all results and conclusions reported herein, which do not necessarily reflect the position of any of the funding agencies.
Additional Contributions: We thank the cohort families for participating in this project; laboratory technician Vibeke K. Pedersen of the University of Southern Denmark for PFC analyses (no extra compensation received); and the staff at the Quality Control Department of Statens Serum Institut, Copenhagen, for performing the antibody analyses.
This article was corrected for errors on February 7, 2012.