1. Department of Ophthalmology, University of California at San Francisco, San Francisco, California, USA
2. Dean McGee Eye Institute, University of Oklahoma, Oklahoma City, Oklahoma USA
3. Retina-Vitreous Surgeons of Central New York, Liverpool, New York, USA
4. Department of Ophthalmology and Visual Sciences, State University of New York Upstate Medical University, Syracuse, New York, USA
5. Department of Ophthalmology, The University of Pittsburgh, Pittsburgh, Pennsylvania, USA