About the Authors

Karri Silventoinen

karri.silventoinen@helsinki.fi

Affiliations Population Research Unit, Department of Social Research, University of Helsinki, Helsinki, Finland, Department of Public Health, University of Helsinki, Helsinki, Finland

Jennifer L. Baker

Affiliation Institute of Preventive Medicine, Copenhagen University Hospital, Copenhagen, Denmark

Thorkild I. A. Sørensen

Affiliation Institute of Preventive Medicine, Copenhagen University Hospital, Copenhagen, Denmark

Competing Interests

The study is supported by Lundbeck Foundation (R13-A1317). Dr. Thorkild Sørensen previously served on the PLoS ONE Board as an Academic Editor. This does not alter the authors' adherence to all the PLoS ONE policies on sharing published materials.

Author Contributions

Conceived and designed the experiments: KS JLB TIAS. Performed the experiments: KS. Analyzed the data: KS. Contributed reagents/materials/analysis tools: JLB TIAS. Wrote the paper: KS JLB TIAS.