1. Interventional Cardiolgy at Scripps Clinic Cedars Sinai Smidt Heart Institute Los Angeles California USA
2. Department of Cardiovascular Medicine and Division of Pulmonary and Critical Care Medicine Mayo Clinic Rochester Minnesota USA
3. Advanced Heart Failure Center Sentara Heart Hospital Norfolk Virginia USA
4. Department of Critical Care Medicine and Division of Cardiology, Department of Medicine University of Alberta Edmonton Alberta Canada
5. The CardioVascular Center Tufts Medical Center Boston Massachusetts USA
6. Minneapolis Heart Institute Foundation at Abbott Northwestern Hospital Minneapolis Minnesota USA
7. The Carl and Edyth Lindner Center for Research and Education The Christ Hospital Cincinnati Ohio USA