Balasubramanya Ramamurthy, Pushker Neelam, Bajaj Mandeep S, Rani Alka
Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, Ansari Nagar, New Delhi, India.
Can J Ophthalmol. 2003 Jun;38(4):297-8. doi: 10.1016/s0008-4182(03)80096-0.