1 Division of Cardiovascular Surgery, Michael E. DeBakey Veterans Affairs Medical Center, Department of Cardiovascular Surgery, Texas Heart Institute, Houston, Texas2Division of Cardiothoracic Surgery, Michael E. DeBakey Department of Surgery, Baylor Colleg.
2 Division of Cardiology, Michael E. DeBakey Veterans Affairs Medical Center, Houston, Texas4Division of Cardiology, Department of Medicine, Baylor College of Medicine, Houston, Texas.
3 The Surgical Service, Jesse Brown Veterans Affairs Medical Center, Chicago, Illinois6Department of Surgery, Northwestern University Feinberg School of Medicine, Chicago, Illinois.