“…None has definitively proven its superiority. FHF severity in infants and children should be evaluated regarding the cause, progression of hepatic encephalopathy, and kinetics of liver failure (international normalized ratio, coagulation factor V activity, serum ammonia, and bilirubin levels) (8,73). Similarly to children with chronic liver disease awaiting for a liver transplantation, we have recently determined that the overall clinical condition of children with FHF could be accurately evaluated through the Pediatric Risk of Mortality score reflecting the extent of dysfunctioning organs or systems (hematologic, circulatory, renal, etc.)…”