1. Department of Cardiology, University of Modern Sciences , Tando Muhammad Khan, Sindh , Pakistan
2. Imperial Clinical Trials Unit, Imperial College London , London , UK
3. Department of Primary Care and Public Health, Imperial College London , London , UK
4. Department of Physiology, Liaquat University of Medical and Health Sciences , Jamshoro, Sindh , Pakistan
5. Karachi Institute of Heart Disease , Karachi, Sindh , Pakistan