- Correspondence to Dr Ronald Danis, Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, School of Medicine and Public Health, 8010 Excelsior Drive, Madison, WI 53717, USA;
- Received January 13, 2013
- Revised August 27, 2013
- Accepted September 6, 2013
- First published November 13, 2013.
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.