- Correspondence to Professor Tien Yin Wong, Singapore National Eye Centre, 11 Third Hospital Avenue, Singapore 168751, Singapore;
- Received August 29, 2014
- Revised November 4, 2014
- Accepted November 19, 2014
- First published December 8, 2014.
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.