1. Department of Ophthalmology, M and J Western Regional Institute of Ophthalmology, B. J. Medical College, Ahmedabad, Gujarat, India,
2. Department of Community Medicine, Adesh Medical College and Hospital, Mohri, Haryana, India,
3. Department of Physiology, Smt. NHL Municipal Medical College, Ahmedabad, Gujarat, India,
4. Department of Pharmacology, Adesh Institute of Medical Sciences and Research, Bathinda, Punjab, India,