. Author manuscript; available in PMC: 2013 Oct 28.
Published in final edited form as: J Thorac Cardiovasc Surg. 2011 Feb 12;142(3):10.1016/j.jtcvs.2011.01.011. doi: 10.1016/j.jtcvs.2011.01.011
Copyright © 2011 by The American Association for Thoracic Surgery