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. Author manuscript; available in PMC: 2013 Jun 1.
Published in final edited form as: J Emerg Med. 2011 Nov 8;42(6):666–677. doi: 10.1016/j.jemermed.2011.06.013

Figure 1.

Figure 1

Respondent accrual. Abbreviations: FF-EMTs = firefighter emergency medical technicians, EMTs = emergency medical technicians