About the Authors

Elizabeth Orton

elizabeth.orton@nottingham.ac.uk

Affiliation Division of Primary Care, University Park, University of Nottingham, Nottingham, United Kingdom

Denise Kendrick

Affiliation Division of Primary Care, University Park, University of Nottingham, Nottingham, United Kingdom

Joe West

Affiliation Division of Epidemiology and Public Health, Nottingham City Hospital, University of Nottingham, Nottingham, United Kingdom

Laila J. Tata

Affiliation Division of Epidemiology and Public Health, Nottingham City Hospital, University of Nottingham, Nottingham, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EO DK JW LT. Performed the experiments: EO. Analyzed the data: EO. Contributed reagents/materials/analysis tools: EO LT. Wrote the paper: EO DK JW LT. Developed the mother/child linked cohort: LT.