From Division of Cardiac Surgery (J.B.K., T.M., T.M.S.), Thoracic Aortic Center (J.B.K., K.K., T.M., E.M.I., R.P.C., T.M.S.), Cardiology Division (M.E.L., E.M.I.), Pediatric Cardiology (M.E.L.), and Vascular and Endovascular Surgery (R.P.C.), Massachusetts General Hospital, Harvard Medical School, Boston; and Department of Thoracic and Cardiovascular Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea (J.B.K., M.E.L.). (2015-10-27時点)