1. Department of Ophthalmology Johns Hopkins School of Medicine Baltimore MD USA
2. Department of Epidemiology Center for Clinical Trials Johns Hopkins Bloomberg School of Public Health Baltimore MD USA
3. AbbVie Inc. North Chicago IL USA
4. Analysis Group, Inc. New York NY USA
5. Clinical Sciences University of Bristol Bristol UK
6. National Institute for Health Research Biomedical Research Centre Moorfields Eye Hospital and Institute of Ophthalmology London UK