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European Glaucoma Prevention Study Group; Pfeiffer N, Torri V, Miglior S, Zeyen T, Adamsons I, Cunha-Vaz J.European Glaucoma Prevention Study Group, et al. Among authors: pfeiffer n.Ophthalmology. 2007 Mar;114(3):454-9. doi: 10.1016/j.ophtha.2006.07.039. Epub 2006 Nov 27.Ophthalmology. 2007.PMID: 17126403Clinical Trial.