About the Authors

Maria A. Quigley

Roles Conceptualization, Formal analysis, Funding acquisition, Methodology, Writing – original draft, Writing – review & editing

maria.quigley@npeu.ox.ac.uk

Affiliation NIHR Policy Research Unit in Maternal and Neonatal Health and Care, National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom

Sian Harrison

Roles Conceptualization, Formal analysis, Methodology, Writing – review & editing

Affiliation NIHR Policy Research Unit in Maternal and Neonatal Health and Care, National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom

Ilana Levene

Roles Conceptualization, Writing – review & editing

Affiliation National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom

Jenny McLeish

Roles Writing – review & editing

Affiliation NIHR Policy Research Unit in Maternal and Neonatal Health and Care, National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom

Phyll Buchanan

Roles Writing – review & editing

Affiliation Breastfeeding Supporter, The Breastfeeding Network, Paisley, United Kingdom

Fiona Alderdice

Roles Conceptualization, Funding acquisition, Writing – review & editing

Affiliation NIHR Policy Research Unit in Maternal and Neonatal Health and Care, National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom

Competing Interests

IL chairs the Hospital Infant Feeding Network, a knowledge sharing and advocacy organisation. IL is a trustee for a local breastfeeding support charity. The other authors have declared that they have no competing interests. This does not alter our adherence to PLOS ONE policies on sharing data and materials.