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Bile-to-liver ratio (BLR) and the BLR increment at the three time points. A shows the BLRs before surgical dissection of the cystohepatic triangle (black line), before clipping the cystic duct (red line), and before closure (blue line). B shows the average BLR increment from the point of surgical dissection of the cystohepatic triangle to clipping the cystic duct
