Author Affiliations: High Plains Research Network, Department of Family Medicine, University of Colorado Health Sciences Center, Denver (Dr Westfall); Oklahoma Physicians Resource/Research Network, Department of Family and Preventive Medicine, University of Oklahoma Health Sciences Center, Oklahoma City (Dr Mold); and Department of Family Medicine, Oregon Rural Practice-Based Research Network, Oregon Health & Science University, Portland (Dr Fagnan).
On the old highway maps of America, the main routes were red and the back roads blue. Now even the colors are changing. But in those brevities just before dawn and a little after dusk—times neither day nor night—the old roads return to the sky some of its color. Then, in truth, they carry a mysterious cast of blue, and it's that time when the pull of the blue highway is strongest, when the open road is a beckoning, a strangeness, a place where a man can lose himself.William Least Heat-Moon, Blue Highways1
Westfall JM, Mold J, Fagnan L. Practice-Based Research—“Blue Highways” on the NIH Roadmap. JAMA. 2007;297(4):403–406. doi:10.1001/jama.297.4.403
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