1. Division of Cardiac Surgery Thomas Jefferson University Philadelphia Pennsylvania USA
2. Division of Cardiovascular Surgery, Department of Surgery Mayo Clinic College of Medicine and Science Rochester Minnesota USA
3. Division of Cardiac Surgery Centre Hospitalié de l'Université de Montréal Montréal Québec Canada
4. Department of Cardiac Surgery, Michigan Medicine University of Michigan Ann Arbor Michigan USA
5. Division of Cardiology, Department of Medicine Henry Ford Health System Detroit Michigan USA