?:authorAffiliation
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[\'Department of Surgery, Duke University, Durham, North Carolina.\', \'Stanford University School of Medicine, Stanford, California.\', \'Division of Epidemiology and Biostatistics, UC Berkeley School of Public Health, Berkeley, California.\', \'Department of Cardiothoracic Surgery, Stanford University, Stanford, California.\', \'Stanford Health Care ValleyCare, Pleasanton, California.\', \'Massachusetts General Hospital, Boston, Massachusetts.\']
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