From the Thoracic and Cardiovascular Institute, Sparrow Health System & Michigan State University, Lansing, Michigan.
The authors report no conflicts of interest regarding the content herein.
Manuscript submitted February 12, 2009, provisional acceptance given March 3, 2009, final version accepted March 11, 2009.
Address for correspondence: Ranjan K. Thakur, MD, MPH, Thoracic and Cardiovascular Institute, 405 West Greenlawn, Suite 400, Lansing, MI 48910. E-mail: [email protected]