About the Authors

Barry Wright

Barry.wright@nyypct.nhs.uk

Affiliation North Yorkshire and York Primary Care Trust, York, United Kingdom

Helen Pearce

Affiliation Tees Esk and Wear Valleys NHS Foundation Trust, Durham, United Kingdom

Victoria Allgar

Affiliation Hull York Medical School, York, United Kingdom

Jeremy Miles

Affiliation RAND Corporation, Santa Monica, California, United States of America

Clare Whitton

Affiliation North Yorkshire and York Primary Care Trust, York, United Kingdom

Irene Leon

Affiliation Food and Environment Research Agency, Sand Hutton, United Kingdom

Jenny Jardine

Affiliation North Yorkshire and York Primary Care Trust, York, United Kingdom

Nicola McCaffrey

Affiliation North Yorkshire and York Primary Care Trust, York, United Kingdom

Rob Smith

Affiliation York NHS Foundation Trust, York, United Kingdom

Ian Holbrook

Affiliation York NHS Foundation Trust, York, United Kingdom

John Lewis

Affiliation Food and Environment Research Agency, Sand Hutton, United Kingdom

David Goodall

Affiliation Department Of Chemistry, York University, York, United Kingdom

Ben Alderson-Day

Affiliation North Yorkshire and York Primary Care Trust, York, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: BW. Analyzed the data: VA JM. Contributed reagents/materials/analysis tools: IH DG IL JL. Wrote the paper: BW VA JM CW NM JJ BA-D. Analyzed samples: IH JL IL. Supported recruitment: RS HP JJ NM CW. Collected samples and data: HP CW JJ NM IH BW.