ERBB2 and breast cancer: IL-6 expression was not associated with survival of BC patients with basal-like disease (P = 0.189), ER-negative (P = 0.212), PgR-positive (P = 0.103), PgR-negative (P = 0.056), Her-2-positive (P = 0.074) nor with the TN (P = 0.687) BC.