1. Postgraduate Course of Infectious Diseases and Tropical Medicine, School of Medicine; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
2. Cardiology and Cardiovascular Surgery Division, Hospital das Clinicas, School of Medicine; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
3. Division of Cardiology; Massachusetts General Hospital, Harvard Medical School; Boston MA
4. Department of Medicine; Massachusetts General Hospital, Harvard Medical School; Boston MA
5. Department of Statistics; Universidade Federal de Minas Gerais; Belo Horizonte Minas Gerais Brazil
6. Cardiac Ultrasound Lab; Massachusetts General Hospital, Harvard Medical School; Boston MA