1. Department of Medicine, Shifa Tameer e Millat University, Islamabad, Pakistan
2. Department of Cardiology, Armed Forces Institute of Cardiology, Rawalpindi, Pakistan
3. Department of Cardiology, DHQ Hospital Chakwal, Chakwal, Pakistan
4. Department of Cardiology, DHQ Hospital, Mirpur, Azad Kashmir Pakistan
5. Department of Cardiology, Rawalpindi Institute of Cardiology, Rawalpindi, Pakistan
6. Department of Cardiology, Punjab Institute of Cardiology, Lahore, Pakistan