1. Division of Cardiovascular Medicine; University of Missouri School of Medicine; Columbia Missouri
2. Division of Cardiovascular, University of California at San Diego, Sulpizio Cardiovascular Center; La Jolla California
3. Section of Cardiovascular Disease, Prairie Cardiovascular Consultant; Springfield Illinois
4. Department of Cardiology, Ochsner Medical Center; New Orleans Louisiana
5. Section of Cardiovascular Disease, University of Oklahoma Health Science Center; Oklahoma City Oklahoma
6. Division of Cardiovascular Medicine, Rhode Island and Miriam Hospitals; Providence Rhode Island
7. School of Medicine, University of Miami Hospital; Miami Florida