- Gordon J Johnson, International Centre for Eye Health, Institute of Ophthalmology, Bath Street, London EC1V 9EL, UK
- Accepted May 3, 2000
- First published November 1, 2000.
If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.