Figure 2.

EGFR protein expression by immunohistochemistry. A: Negative EGFR expression; B: 1+ EGFR expression; C: 2+ EGFR expression; D: 3+ EGFR expression.

Lv et al. Diagnostic Pathology 2011 6:118   doi:10.1186/1746-1596-6-118
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