1. Department of Internal Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
2. Department of Internal Medicine, Hospital Universitario del Caribe, Universidad de Cartagena, Cartagena, Colombia
3. Department of Internal Medicine, Universidad del Sinu, Cartagena, Colombia
4. Division of Cardiology, Texas Tech University Health Sciences Center, Lubbock, Texas
5. Department of Cardiology, Patras University School of Medicine, Patras, Greece