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The S-stamp in Descemet Membrane Endothelial Keratoplasty Safely Eliminates Upside-down Graft ImplantationVeldman, Peter B.; Dye, Philip K.; Holiman, Jeffrey D.; Mayko, Zachary M.; Sáles, Christopher S.; Straiko, Michael D.; Galloway, Joshua D.; Terry, Mark A. · Ophthalmology · 2016