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Among the four subtypes, TTF was 10.0 months in the EPN group and 3.7 months in the non-EPN group in the luminal type (p = <0.001); 31.7 months in the EPN group and 17.5 months in the non-EPN group in the luminal-HER2 type (p = 0.270); 15.9 months in the EPN group and 9.5 months in the non-EPN group in the HER2 type (p = 0.029); and 6.1 months in the EPN group and 3.7 months in the non-EPN group of the triple negative type (p = 0.043).
