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Table 2 The association between adjuvant hormone treatment and change in serum EGFR and serum HER2 levels

From: Serum epidermal growth factor receptor and HER2 expression in primary and metastatic breast cancer patients

   Change in serum EGFR Change in serum HER2
   No Yes No Yes
On adjuvant treatment No 8 8 8 8
  Yes 11 1 8 4
    P = 0.039   P = 0.459
  1. EGFR, epidermal growth factor receptor; HER, human epidermal growth factor receptor.