1. University of Nevada Reno School of Medicine, Cardiology, 89557, Reno, NV USA
2. Division of Cardiology, Virginia Commonwealth University Medical College of Virginia, Richmond, VA USA
3. Division of Cardiology, Indiana University School of Medicine, Indianapolis, IN USA
4. Division of Cardiology, University of Kentucky College of Medicine, Bowling Green, KY USA
5. Division of Pulmonology, Emory University School of Medicine, Atlanta, GA USA
6. Department of Medicine, University of Louisville School of Medicine, Louisville, KY USA