CALB2 and cancer: Ligand-receptor-based cancer-immune crosstalk analysis demonstrated that stellate cells, fibroblast cells, and ductal cells ranked high among all upregulated cross-talking cell types in CALB2-high expression cells compared to CALB2-low expression cells, suggesting that CALB2 may engage in cell-cell communication between PSCs, CAFs, and cancer cells (Fig. S4C-D).