1. Division of Cardiovascular Medicine (T.F.S., S.C., J.E.C., F.Z., H.G.), Knight Cardiovascular Institute, Oregon Health and Science University, Portland.
2. Division of Cardiology, Portland VA Medical Center, OR (T.M.A.).
3. Division of Cardiothoracic Surgery, Department of Surgery, Emory University School of Medicine, Atlanta, GA (K.J.G.).
4. Division of Cardiothoracic Surgery (G.L., H.K.S.), Knight Cardiovascular Institute, Oregon Health and Science University, Portland.