Figure 1.
Immunohistochemistry of biliary tract cancer specimens for expression of HER2 (A, C, E and G) and EGFR (B, D, F and H). A: HER2 neg.; B: EGFR neg.; C: HER2 1+; D: EGFR 1+; E: HER2 2+; F: EGFR 2+; G: HER2 3+; H: EGFR 3+.
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