- Correspondence to Dr Gerene Denning, Department of Emergency Medicine, 1008 Roy Carver Pavilion, University of Iowa, Hospitals and Clinics, 200 Hawkins Drive, Iowa City, IA 52242, USA;
- Received July 3, 2012
- Revised November 5, 2012
- Accepted November 25, 2012
- First published December 20, 2012.
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