1 Division of Cardiology, Department of Medicine, Brown University Alpert Medical School, 830 Chalkstone Ave, Providence, RI, 02908, USA. [email protected].
2 Division of Internal Medicine, University Hospital, University of Sao Paulo, Sao Paulo, Brazil.
3 Malcolm Randall VA Medical Center, Department of Medicine, University of Florida College of Medicine, Gainesville, FL, USA.