About the Authors

Shuk-Li Man

shuk-li.man.10@ucl.ac.uk

Affiliation Research Department of Primary Care and Population Health, University College London, London, United Kingdom

Irene Petersen

Affiliation Research Department of Primary Care and Population Health, University College London, London, United Kingdom

Mary Thompson

Affiliation Cegedim Strategic Data Medical Research UK, London, United Kingdom

Irwin Nazareth

Affiliation Research Department of Primary Care and Population Health, University College London, London, United Kingdom

Competing Interests

Dr. Shuk-Li Man's PhD is largely funded by the Medical Research Council, UK, but the authors also receive commercial funding for this research from Cegedim Strategic Data Medical Research UK, and Dr. Mary Thompson is also employed by Cegedim Strategic Data Medical Research UK. The authors declare that this does not alter their adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: SM IP IN MT. Performed the experiments: SM. Analyzed the data: SM. Wrote the paper: SM.