1. Department of Surgery University of Pittsburgh Medical Center Pittsburgh Pennsylvania USA
2. Section of Pediatric Cardiothoracic Surgery Medical University of South Carolina Charleston South Carolina USA
3. Department of Public Health Sciences Medical University of South Carolina Charleston South Carolina USA
4. Division of Cardiac Surgery Temple University Hospital Philadelphia Pennsylvania USA
5. Division of Cardiothoracic Surgery Medical University of South Carolina Charleston South Carolina USA
6. School of Business, George Mason University Fairfax Virginia USA