Inclusion Criteria:  - All successive adult patients who underwent a liver transplantation between July 2008 and January 2021 at the Centre hospitalier de l'Université de Montréal (CHUM).  Exclusion Criteria:  - All patients who were under renal replacement therapy prior to surgery as well as those who had a glomerular filtration rate below 30 mL/h (based on MDRD formula).