- Correspondence to Dr Saranya Srinivasan, Division of Emergency Medicine and Transport, Children's Hospital Los Angeles, 4650 Sunset Blvd, Mailstop #113, Los Angeles, CA 90027, USA;
- Received June 14, 2013
- Revised November 23, 2013
- Accepted November 27, 2013
- First published December 13, 2013.
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