- Correspondence to Dr Kelly D Young, Department of Emergency Medicine, David Geffen School of Medicine at UCLA, Harbor-UCLA Medical Center, 1000 W. Carson Street, Box 21, Building D-9, Torrance, CA 90275, USA;
- Received February 4, 2014
- Revised May 22, 2014
- Accepted June 12, 2014
- First published July 2, 2014.
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