<style face="normal" font="default" size="100%">Effect of work-hours regulations on intensive care unit mortality in United States teaching hospitals.</style>

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0<style face="normal" font="default" size="100%">Effect of work-hours regulations on intensive care unit mortality in United States teaching hospitals.</style><style face="normal" font="default" size="100%">Effect of work-hours regulations on intensive care unit mortality in United States teaching hospitals.</style>