- Correspondence to: Professor Xiaoxin Li People Eye Center, People’s Hospital of Peking University, No 11 Beijing Xizhimen Nan Street, Beijing, 100044, China;
- Accepted September 14, 2005
- First published February 17, 2006.
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.