Brian L. Cmolik - Departments of Surgery, Pittsburgh, Pa
Joel A. Spero - Medicine Allegheny General Hospital, Cardiovascular and Pulmonary Research Center, Allegheny-Singer Research Institute, Allegheny Campus, The Medical College of Pennsylvania, Pittsburgh, Pa
George J. Magovern - University of Pittsburgh
Richard E. Clark - Departments of Surgery, Pittsburgh, Pa
Carol Reid - Medicine Allegheny General Hospital, Cardiovascular and Pulmonary Research Center, Allegheny-Singer Research Institute, Allegheny Campus, The Medical College of Pennsylvania, Pittsburgh, Pa