1. Department of Ophthalmology, Pak International Medical College, Peshawar, Pakistan;
2. Mohammad Teaching Hospital, Peshawar, Pakistan;
3. Avicenna Medical College and Hospital, Lahore, Pakistan;
4. Pakistan Institute of Medical Sciences, Islamabad, Pakistan;
5. Aga Khan University, Karachi, Pakistan; and
6. Allama Iqbal Medical College, Lahore, Pakistan.