- Correspondence to Yih-Chung Tham, Singapore Eye Research Institute, Singapore National Eye Centre, Singapore, Singapore;
- Received January 20, 2020
- Revised May 6, 2020
- Accepted June 3, 2020
- First published July 16, 2020.
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.