1. Department of Internal Medicine, University of Nevada, Reno, NV, USA
2. Department of Internal Medicine, Rochester General Hospital, Rochester, NY, USA
3. Department of Cardiology, West Virginia University, Morgantown, WV, USA
4. Department of Internal Medicine, New York Medical College/Landmark Medical Center, Woonsocket, RI, USA
5. Division of Cardiovascular Medicine, NorthShore University Health System-Metro Chicago, Evanston, IL, USA
6. Department of Critical Care, Pakistan Railway Hospital, Rawalpindi, Pakistan
7. Department Of Cardiology, Rochester General Hospital, Rochester, NY, USA
8. Division of cardiovascular medicine, University of Arkansas School of Medicine, Little Rock, AR, USA