1. Division of Cardiology, Department of Medicine, University of Iowa, Iowa City, IA, USA
2. Department of Medicine, University of Iowa, Iowa City, IA, USA
3. Department of Internal Medicine, University of Kentucky, Lexington, KY, USA
4. Department of Cardiology, Case Western Reserve University/MetroHealth Medical Center, Cleveland, OH, USA
5. Department of Gastroenterology, Indiana University, Indianapolis, IN, USA
6. Department of Cardiology, University of Connecticut, Farmington, CT, USA