1. Department of Ophthalmology, Sarojini Naidu Medical College, Agra, Uttar Pradesh, India
2. Department of Ophthalmology, Autonomous State Medical College, Firozabad, Uttar Pradesh, India
3. Department of Ophthalmology, Lala Lajpat Rai Memorial Medical College, Meerut, Uttar Pradesh, India
4. Department of Preventive and Social Medicine, Sarojini Naidu Medical College, Agra, Uttar Pradesh, India