Truckers' health focus of Mayo doctor's study
by Lorna Benson, Minnesota Public Radio

Dr. Clayton Cowl talks about the trucker lifestyle and how new federal rules will require truckers to get medical clearance from doctors who have been certified to do their occupational exams. Cowl, a doctor at Mayo Clinic, decided to get his trucking license so he'd have a better idea of what his patients' needs are. (Alex Kolyer for MPR News)

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