About the Authors

Kristjana Einarsdóttir

keinarsdottir@ichr.uwa.edu.au

Affiliation Telethon Institute for Child Health Research, Centre for Child Health Research, University of Western Australia, Subiaco, Perth, Western Australia, Australia

Amanda Langridge

Affiliation Telethon Institute for Child Health Research, Centre for Child Health Research, University of Western Australia, Subiaco, Perth, Western Australia, Australia

Geoffrey Hammond

Affiliation Telethon Institute for Child Health Research, Centre for Child Health Research, University of Western Australia, Subiaco, Perth, Western Australia, Australia

Anthony S. Gunnell

Affiliation Health and Wellness Institute, Edith Cowan University, Joondalup, Perth, Western Australia, Australia

Fatima A. Haggar

Affiliation Centre for Health Services Research, School of Population Health, The University of Western Australia, Crawley, Perth, Western Australia, Australia

Fiona J. Stanley

Affiliation Telethon Institute for Child Health Research, Centre for Child Health Research, University of Western Australia, Subiaco, Perth, Western Australia, Australia

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: KE. Wrote the paper: KE. Initiated the research, designed the study, interpreted the data: KE. Gave advice on the statistical methods used for analysis and discussed ideas: AL GH ASG FAH. Supervised the work, gave advice and contributed to the paper: FJS. Revised the paper critically for important intellectual content and approved it to be published: KE AL GH ASG FAH FJS.

Supervised the work, gave advice and contributed to the paper: FJS. Revised the paper critically for important intellectual content and approved it to be published: KE AL GH ASG FAH FJS.