Affiliation: | 1. Google Health, Palo Alto, CA 94304, USA;2. Google Health, Cambridge, MA 02142, USA;3. NIHR Biomedical Research Centre at Moorfields Eye Hospital and UCL Institute of Ophthalmology, London EC1V 9EL, UK;4. MRC Epidemiology Unit, University of Cambridge, Cambridge CB2 0SL, UK |