About the Authors

Olli Pietiläinen

olli.k.pietilainen@helsinki.fi

Affiliation Department of Public Health, Hjelt Institute, University of Helsinki, Helsinki, Finland

Mikko Laaksonen

Affiliation Department of Public Health, Hjelt Institute, University of Helsinki, Helsinki, Finland

Ossi Rahkonen

Affiliation Department of Public Health, Hjelt Institute, University of Helsinki, Helsinki, Finland

Eero Lahelma

Affiliation Department of Public Health, Hjelt Institute, University of Helsinki, Helsinki, Finland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: OP ML OR EL. Analyzed the data: OP. Wrote the paper: OP ML OR EL.