GPT and Biliary tract obstruction: Similarly, when other liver function parameters (alkaline phosphatase [ALP], aspartate aminotransferase [AST], and alanine aminotransferase [ALT]) were measured and correlated to the day 3 biomarkers, only ST2 was slightly associated with ALP, while there was no correlation between any biomarker and AST and ALT on day 3 (Supplemental Tables 9–11), indicating that ST2 might correlate with early bile duct obstruction.