In the original publication of this article, Pediatric Emergency Research Canada (PERC) was not listed as an author.
The authors regret this error. The original version has been updated.
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Published online by Cambridge University Press: 29 June 2018
In the original publication of this article, Pediatric Emergency Research Canada (PERC) was not listed as an author.
The authors regret this error. The original version has been updated.