1 From Division of Cardiovascular Medicine (P.R.L., B.M.S.), Department of Anesthesiology, Perioperative and Pain Medicine (D.A.S.), Division of Cardiothoracic Surgery (G.S.C., P.C.C.), and Division of Pulmonary and Critical Care (G.L.W.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
2 From Division of Cardiovascular Medicine (P.R.L., B.M.S.), Department of Anesthesiology, Perioperative and Pain Medicine (D.A.S.), Division of Cardiothoracic Surgery (G.S.C., P.C.C.), and Division of Pulmonary and Critical Care (G.L.W.), Brigham and Women's Hospital, Harvard Medical School, Boston, MA. bscirica@partners.org.