External beam irradiation of subfoveal choroidal neovascularization complicating age-related macular degeneration: One-year results of a prospective, double-masked, randomized clinical trial

D. M. Marcus, W. C. Sheils, M. H. Johnson, S. B. McIntosh, D. B. Leibach, A. Maguire, J. Alexander, C. N. Samy