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. Author manuscript; available in PMC: 2014 Dec 1.
Published in final edited form as: J Pediatr. 2013 Aug 27;163(6):10.1016/j.jpeds.2013.07.025. doi: 10.1016/j.jpeds.2013.07.025

Figure 1.

Figure 1

Distribution of total CNC rates per quarter over 18 months by driver risk group (n = 42). Four participants in the low-risk group had zero CNC and cannot be shown in the plot.