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IVAN Study Investigators; Chakravarthy U, Harding SP, Rogers CA, Downes SM, Lotery AJ, Wordsworth S, Reeves BC.IVAN Study Investigators, et al.Ophthalmology. 2012 Jul;119(7):1399-411. doi: 10.1016/j.ophtha.2012.04.015. Epub 2012 May 11.Ophthalmology. 2012.PMID: 22578446Clinical Trial.