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For nearly three months last year, 25 Prescott firefighters voluntarily subjected themselves to wearing Holter monitors for 12 to 24-hour periods purely in the name of research. (Les Stukenberg/Courier)

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For nearly three months last year, 25 Prescott firefighters voluntarily subjected themselves to wearing Holter monitors for 12 to 24-hour periods purely in the name of research.

By Max Efrein April 2, 2018