Surgical Procedure
Donor grafts were allocated by the Dutch Transplant Foundation (Nederlandse Transplantatie Stichting, Leiden, the Netherlands). The grafts were cultured and provided prepeeled by the ETB-Bislife (Beverwijk, the Netherlands), with a minimum endothelial cell density (ECD) of 2300 cells/mmAll surgical procedures were performed by experienced corneal surgeons (H.D., R.M.M.A.N, M.M.D., and R.P.L.W.). The surgical procedure was standardized because all included cases were part of the ADVISE trial. The study protocol has been reported in detail before; both arms of the trial were combined in this report on video grading.