About the Authors
- Gilles Kayem
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Affiliation National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom
- Jennifer Kurinczuk
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Affiliations National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom, Policy Research Unit in Maternal Health and Care, University of Oxford, Oxford, United Kingdom
- Gwyneth Lewis
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Affiliations National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom, Department of Health, London, United Kingdom, Centre for Maternal and Child Enquiries, London, United Kingdom
- Shona Golightly
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Affiliation Centre for Maternal and Child Enquiries, London, United Kingdom
- Peter Brocklehurst
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Affiliation Policy Research Unit in Maternal Health and Care, University of Oxford, Oxford, United Kingdom
- Marian Knight
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* E-mail: marian.knight@npeu.ox.ac.uk
Affiliations National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom, Policy Research Unit in Maternal Health and Care, University of Oxford, Oxford, United Kingdom
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: JK GL SG PB MK. Performed the experiments: MK. Analyzed the data: GK JK GL SG PB MK. Wrote the paper: GK JK GL SG PB MK.