- Correspondence to Dr Wei Chen, The School of Ophthalmology and Optometry, Wenzhou Medical College, 270 Xueyuan West Road, Wenzhou, Zhejiang 325027, People's Republic of China;
- Received September 3, 2013
- Revised November 13, 2013
- Accepted December 11, 2013
- First published January 13, 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.