The evidence for volume-outcome relationships across different surgical procedures including aortic and mitral valve surgery is mostly limited to facility level and/or annual assessments ([1][1],[2][2]). Cumulative surgical expertise is important… Click to show full abstract
The evidence for volume-outcome relationships across different surgical procedures including aortic and mitral valve surgery is mostly limited to facility level and/or annual assessments ([1][1],[2][2]). Cumulative surgical expertise is important in some surgical procedures ([3][3]) and needs to be
               
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