?:authorAffiliation
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[\'Division of General Internal Medicine, University of Pennsylvania, Philadelphia.\', \'Leonard Davis Institute of Health Economics, University of Pennsylvania, Philadelphia.\', \'UnitedHealth Group, Minnetonka, Minnesota.\', \'Department of Biostatistics, Epidemiology, and Informatics, University of Pennsylvania, Philadelphia.\', \'Cpl Michael J. Crescenz VA Medical Center, Philadelphia, Pennsylvania.\']
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