1. Division of Cardiothoracic Surgery (G.M.W.), University of California San Francisco Medical Center, CA.
2. Department of Medicine (L.K.), University of California San Francisco Medical Center, CA.
3. Department of Surgery, St. Paul’s Hospital, Vancouver, British Columbia (A.W.C.).
4. Department of Cardiac Surgery, University of Kansas Medical Center (M.R.D.).
5. Department of Cardiovascular and Thoracic Surgery, Baptist Heart Institute, Memphis, TN (M.S.).
6. Division of Cardiology, University of Washington Medical Center, Seattle (C.M.).
7. Division of Cardiac Surgery, Ohio State University Wexner Medical Center, Columbus (N.A.M.).
8. Cardiac Surgery, Los Robles Regional Medical Center, Thousand Oaks, CA (S.M.).
9. Department of Thoracic and CV Surgery, Loyola University Medical Center, Maywood, IL (E.C.M.).