1. North Florida Regional Medical Center, University of Central Florida (Gainesville), Gainesville, FL, USA
2. Department of Internal Medicine, Dow University of Health Sciences (DUHS), Karachi, Pakistan
3. Post Doc Fellow Cardiology, Beth Israel Deaconess Medical Center, Boston, MA, USA
4. Department of Internal Medicine, Agha Khan University Hospital, Karachi, Pakistan
5. Department of Internal Medicine, Ziauddin Medical University Hospital, Karachi, Pakistan