Center for Healthcare Outcomes and Policy, Department of Surgery, University of Michigan, Ann Arbor, MI
*Correspondence address: Kyle H Sheetz, MS, Center for Healthcare Outcomes and Policy, Department of Surgery, University of Michigan, School of Medicine, Ann Arbor, MI 48109.
E-mail: [email protected]
Received December 31, 2013; revised February 8, 2014; accepted February 19, 2014.
CME questions for this article available athttp://jacscme.facs.org
Disclosure Information: Authors have nothing to disclose. Timothy J Eberlein, Editor-in-Chief, has nothing to disclose.
Financial activities outside of the scope of this article: Dr Birkmeyer is Chief Scientific Officer with a financial interest in Arbormetrix, Inc., which had no role in this study.
This study was supported by National Institute on Aging grant R01AG042340 awarded to Drs Birkmeyer, Campbell, and Ghaferi.
Presented at the Surgical Forum, American College of Surgeons 99th Annual Clinical Congress, Washington, DC, October 2013.