?:authorAffiliation
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[\'Veterans Affairs Boston Healthcare System, Department of Medicine, Boston, Massachusetts, USA.\', \'Veterans Affairs Boston Center for Healthcare Organization and Implementation Research, Boston, Massachusetts, USA.\', \'Harvard Medical School, Boston, Massachusetts, USA.\', \'University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, USA.\', \'William S. Middleton Memorial Veterans Affairs Hospital, Madison, Wisconsin, USA.\', \'IDEAS Center, Veterans Affairs Salt Lake City Healthcare System, Salt Lake City, Utah, USA.\', \'Division of Epidemiology, University of Utah School of Medicine, Salt Lake City, Utah, USA.\']
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