About the Authors

Justine A. Ellis

justine.ellis@mcri.edu.au

Affiliations Environmental and Genetic Epidemiology Research, Murdoch Childrens Research Institute, Parkville, Australia, Department of Physiology, University of Melbourne, Melbourne, Australia

Anne-Louise Ponsonby

Affiliations Environmental and Genetic Epidemiology Research, Murdoch Childrens Research Institute, Parkville, Australia, Menzies Research Institute, University of Tasmania, Hobart, Australia

Angela Pezic

Affiliation Environmental and Genetic Epidemiology Research, Murdoch Childrens Research Institute, Parkville, Australia

Elizabeth Williamson

Affiliation Environmental and Genetic Epidemiology Research, Murdoch Childrens Research Institute, Parkville, Australia

Jennifer A. Cochrane

Affiliation Menzies Research Institute, University of Tasmania, Hobart, Australia

Joanne L. Dickinson

Affiliation Menzies Research Institute, University of Tasmania, Hobart, Australia

Terence Dwyer

Affiliations Environmental and Genetic Epidemiology Research, Murdoch Childrens Research Institute, Parkville, Australia, Menzies Research Institute, University of Tasmania, Hobart, Australia

Competing Interests

Commercial part-funding was provided by Wyeth Pharmaceuticals. The funder was not involved in the study design, collection, analysis and interpretation of data, writing of the paper, or decision to submit for publication. This funding does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: ALP TD. Performed the experiments: JD JC. Analyzed the data: JE AP ALP EW. Wrote the paper: JE ALP AP EW JC JD TD.