About the Authors

Elizabeth Orton

elizabeth.orton@nottingham.ac.uk

Affiliation Lecturer and Specialty Registrar in Public Health, Division of Primary Care, University Park, University of Nottingham, Nottingham United Kingdom

Denise Kendrick

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

Joe West

Affiliation Clinical Associate Professor and Reader in Epidemiology; Consultant Gastroenterologist, Division of Epidemiology and Public Health, Nottingham City Hospital, University of Nottingham, Nottingham, United Kingdom

Laila J. Tata

Affiliation Associate Professor in Epidemiology, 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 LJT. Performed the experiments: EO. Analyzed the data: EO DK JW LJT. Contributed reagents/materials/analysis tools: LJT. Contributed to the writing of the manuscript: EO DK JW LJT.