1. Department of Cardiology, Rawalpindi Institute of Cardiology, Rawalpindi, Pakistan
2. Department of Medicine, Rawalpindi Medical University, Rawalpindi, Pakistan
3. Department of Medicine, Shifa Tameer-e-Millat University, Islamabad, Pakistan
4. Department of Community Medicine, National University of Medical Sciences, Rawalpindi, Pakistan
5. Department of Hematology, Foundation University Medical College, Islamabad, Pakistan