About the Authors
- Robert Carroll
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* E-mail: robert.carroll@bristol.ac.uk
Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
- Chris Metcalfe
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Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
- David Gunnell
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Affiliation School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: RC CM DG. Analyzed the data: RC. Wrote the paper: RC CM DG.