Fig. 1From: Clinical characteristics, risk factors and outcome of severe Norovirus infection in kidney transplant patients: a case-control studyComparative event-free survival curves between cases and controls for acute rejection episodes (a) and return to dialysis (b). Survival and event-free survival curves were obtained using Kaplan-Meier plots with censoring for loss to follow-up or end of observation for survival without rejection (a) and survival without dialysis (b). Comparison between cases and controls were made using log-rank testsBack to article page