1. 1Department of Internal Medicine, Dow Medical College, Dow University of Health Sciences, Karachi, Pakistan;
2. 2City Gynae Hospital Toba Tek Singh, Medicine, Toba Tek Singh, Punjab, Pakistan;
3. 3Dubai Medical College for Girls, Faculty of Medicine, Dubai, United Arab Emirates;
4. 4General Medicine and Surgery, Punjab Medical College, Faisalabad, Pakistan;
5. 5Department of Internal Medicine, Allied Hospital, Faisalabad, Pakistan;
6. 6Department of Internal Medicine, Dow University Ojha Hospital, Karachi, Pakistan;
7. 7Department of Internal Medicine, Aga Khan University, Karachi, Pakistan;
8. 8Department of Internal Medicine, Capital Hospital, Islamabad, Pakistan;
9. 9Department of Internal Medicine, Ziauddin Medical University, Karachi, Pakistan;
10. 10Department of General Surgery, Dow University of Health Sciences, Karachi, Pakistan;
11. 11World Health Organization, Zhob, Pakistan