Figure 1From: Topoisomerase II alpha expression and the benefit of adjuvant chemotherapy for postoperative patients with non-small cell lung cancer Positive expression of TopIIα and Ki67 in non-small cell lung cancer by immunohistochemistry using the EnVision two-step method. (A) and (B) correspond to ×200 and ×400 magnification of TopIIα respectively; (C) and (D) correspond to ×200 and ×400 magnification of Ki67 respectivelyBack to article page