1. Retina Division, Wilmer Eye Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland
2. Gloucestershire Hospitals National Health Service Foundation Trust, Cheltenham General Hospital, Cheltenham, United Kingdom
3. University of Oxford Medical Sciences Division, Ophthalmology, John Radcliffe Hospital, Oxford, United Kingdom
4. Boehringer Ingelheim International, Ingelheim am Rhein, Germany