About the Authors

Eleanor Robertson

Affiliation Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom

Lauren Morgan

Affiliation Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom

Steve New

Affiliation Saïd Business School, University of Oxford, Oxford, United Kingdom

Sharon Pickering

Affiliation Warwick Medical School, University of Coventry and Warwick, Warwick, United Kingdom

Mohammed Hadi

Affiliation Warwick Medical School, University of Coventry and Warwick, Warwick, United Kingdom

Gary Collins

Affiliation Centre for Statistics in Medicine, University of Oxford, Oxford, United Kingdom

Oliver Rivero Arias

Affiliations Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom, Red de Investigación de Servicios Sanitarios en Cronicidad (REDISSEC), Madrid, Spain

Damian Griffin

Affiliation Warwick Medical School, University of Coventry and Warwick, Warwick, United Kingdom

Peter McCulloch

peter.mcculloch@nds.ox.ac.uk

Affiliation Nuffield Department of Surgical Sciences, University of Oxford, Oxford, United Kingdom

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: PM SN. Performed the experiments: LM ER MH. Analyzed the data: LM GC OR. Wrote the paper: ER LM SN SP MH GC OR DG PM. Devised and performed statistical analysis: OR GC. Wrote first draft or paper: ER. Led evaluation team: LM. Co-ordinated activities at 2 of 5 sites, co-supervised MH and SP: DG. Contributed to observations, intervention delivery and writing: MH SP.