1. Department of Medicine Federal University of Minas Gerais Belo Horizonte Brazil
2. Department of Medicine Cesumar University Maringa Brazil
3. Division of Cardiology Washington University in St. Louis St. Louis Missouri USA
4. Cardiovascular Research Foundation New York New York USA
5. Jackson Memorial Hospital Miami Florida USA
6. Heart and Vascular Center, Brigham and Women's Hospital, Harvard Medical School Boston Massachusetts USA