More needs to be done
- PMID: 21914740
- DOI: 10.1136/bmj.d5773
More needs to be done
Comment on
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The health risks and benefits of cycling in urban environments compared with car use: health impact assessment study.BMJ. 2011 Aug 4;343:d4521. doi: 10.1136/bmj.d4521. BMJ. 2011. PMID: 21816732 Free PMC article.
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