GPT and injury: Among the 221 children, alanine aminotransferase (ALT) ≥ 5 × the upper limit of normal (ULN) was found in 49 children, and 2 children had ALT ≥ 3 × ULN and total bilirubin (TBIL) > 2 × ULN, for a total of 51 children in the severe liver injury group.