1. From the Stanford Cardiovascular Institute (J.C.W., Y.J.W., M.M., R.A.H., T.Q.), Stanford University School of Medicine, CA.
2. Division of Cardiology (J.C.W., R.A.H., T.Q.), Stanford University School of Medicine, CA.
3. Department of Cardiothoracic Surgery (Y.J.W.), Stanford University School of Medicine, CA.
4. Department of Medicine (R.A.H.), Stanford University School of Medicine, CA.