- Correspondence to: Dr Kennon Heard Division of Emergency Medicine, University of Colorado School of Medicine, The Denver Health Residency in Emergency Medicine, 4200 E 9th Ave B215, Denver, CO 80262, USA;
- Received May 6, 2005
- Accepted September 25, 2005
- Revised September 20, 2005
- First published July 28, 2006.
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