1. Advanced Heart Failure Section, Cardiovascular Division, (R.Y.L.-R., S.L.), Spectrum Health, Grand Rapids, MI.
2. Division of Cardiothoracic Surgery (T.B., M.L.), Spectrum Health, Grand Rapids, MI.
3. Cardiovascular Division (J.T.), University of Alabama at Birmingham.
4. Cardiovascular Diseases Division, University of Arizona Sarver Heart Center, Tucson, AZ (K.L., D.A.).
5. Kirklin Institute for Research in Surgical Outcomes (D.A.K., R.S.C., J.K.K.), University of Alabama at Birmingham.