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Emergency department injury surveillance and aetiological research: bridging the gap with the two-stage case–control study design
- Correspondence to Brent Hagel, C4-434, Alberta Children's Hospital, 2888 Shaganappi, Trail NW, Calgary, Alberta T3B 6A8, Canada; brent.hagel{at}albertahealthservices.ca
Citation
Emergency department injury surveillance and aetiological research: bridging the gap with the two-stage case–control study design
Publication history
- Accepted November 30, 2010
- First published March 1, 2011.
Online issue publication
May 13, 2016
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© 2011, Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.