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The disease‐specific survival and disease‐overall survival of ER‐positive groups of PLC patients and IDC patients. Kaplan–Meier test for disease‐specific survival (χ 2 = 1.929, P = 0.1521, Fig. 3A) and disease‐overall survival (χ 2 = 0.741, P = 0.3674, Fig. 3B) to compare ER‐positive groups of PLC patients and IDC patients.
