From the Division of Cardiothoracic Surgery (R.M.O., C.B., J.F., R.T.C., Y.L., M.P.R., H.P.G., F.W.S.) and the Department of Surgery (N.R.S.), Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Mass; and the Alpert Medical School of Brown University (F.W.S.), Providence, RI. (At 2009-09-15)
