About the Authors

Jean Golding

jean.golding@bristol.ac.uk

Affiliation Centre for Child and Adolescent Health, Department of Community Based Medicine, University of Bristol, Bristol, United Kingdom

Colin Steer

Affiliation Centre for Child and Adolescent Health, Department of Community Based Medicine, University of Bristol, Bristol, United Kingdom

Marcus Pembrey

Affiliation Centre for Child and Adolescent Health, Department of Community Based Medicine, University of Bristol, Bristol, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JG CDS MP. Performed the experiments: JG MP. Analyzed the data: CDS. Wrote the paper: JG CDS MP.