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SALL4 expression in lung cancer tissues. (A) No expression of SALL4 in normal lung tissue. (B) Weak expression of SALL4 in adenocarcinoma tissue. (C) Strong expression of SALL4 in small cell carcinoma tissue. (D) Strong expression of SALL4 in squamous cell carcinoma tissue. Representative immunohistochemistry staining images are shown (magnification, ×400). SALL4, Sal-like protein 4.
