About the Authors
- Kathryn E. Fitzpatrick
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Affiliation National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom
- Susan Sellers
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Affiliation University Hospitals Bristol NHS Trust, Bristol, United Kingdom
- Patsy Spark
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Affiliation National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom
- Jennifer J. Kurinczuk
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Affiliation National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom
- Peter Brocklehurst
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Affiliation Institute for Women's Health, University College London, London, United Kingdom
- Marian Knight
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* E-mail: kate.fitzpatrick@npeu.ox.ac.uk
Affiliation National Perinatal Epidemiology Unit, University of Oxford, Oxford, United Kingdom
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: SS JJK PB MK. Analyzed the data: KF. Wrote the paper: KF. Contributed to the writing of the manuscript: SS PS JJK PB MK. Contributed to the analysis: JJK MK. Data coding and validation: KF PS.