1. Division of Cardiovascular Medicine, Baylor College of Medicine, Houston, Texas, USA
2. Department of Medicine,
Creighton University Medical Center, Omaha, Nebraska, USA
3. Division of Cardiovascular Medicine, Mercy Medical
Center, Iowa Heart Center, Des Moines, Iowa, USA
4. Division of Cardiovascular Medicine, University of Nebraska
Medicine, Omaha, Nebraska, USA
5. Department of Medicine, CHI Health Good Samaritan Hospital, Kearney, Nebraska,
USA
6. Department of Medicine, Pakistan Medical Center, Islamabad, Pakistan
7. Department of Medicine, East
Carolina University/Vidant Medical Center, Greenville, North Carolina, USA