1. Department of Ophthalmology, University Hospitals Leuven, Leuven, Belgium
2. Wills Eye Hospital, Philadelphia, Pennsylvania
3. Moorfields Eye Hospital & Institute of Ophthalmology, London, England
4. Royal Victorian Eye & Ear Hospital, East Melbourne, Victoria, Australia
5. Department of Ophthalmology, Harvard Medical School, Boston, Massachusetts
6. Eye Care Center, Department of Ophthalmology and Visual Sciences, University of British Columbia, Vancouver, British Columbia, Canada
7. Section of Ophthalmology, MD Anderson Cancer Center, Houston, Texas
8. Consultores Oftalmologicos, Buenos Aires, Argentina
9. Department of Ophthalmology, Medical College of Wisconsin, Milwaukee