GPT and periventricular leukomalacia: Compared to PVL, BPL led to a transient aggravation of the serum liver damage markers, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) at day 2 and day 3 (SI-Fig. 2A,B), and a prolonged elevation of total bilirubin and serum BA (SI-Fig. 2C,D).