About the Authors

Ken K Ong
Medical Research Council Epidemiology Unit, Cambridge, United Kingdom

Ken K Ong, David B Dunger
Department of Paediatrics, University of Cambridge, Cambridge, United Kingdom

Kate Northstone, Andy R Ness
Department of Social Medicine, University of Bristol, United Kingdom

Jonathan CK Wells
Childhood Nutrition Research Centre, Institute of Child Health, London, United Kingdom

Carol Rubin
National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, United States of America

Jean Golding
Department of Community Based Medicine, University of Bristol, United Kingdom

Corresponding Author

ken.ong@mrc-epid.cam.ac.uk

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

KKO, CR and DBD contributed to the original hypothesis. KKO, CR, ARN, JG and DBD contributed to the study design. ARN and JG oversaw the fieldwork and acquisition of the data. KKO and KN performed data management and statistical analyses. All authors contributed to interpretation of the data and writing the paper.