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FRα protein (A) and FOLR1 mRNA (B and C) expression scores in lung adenocarcinoma by EGFR mutation status. A, FRα protein expression was determined by immunohistochemistry (IHC). B and C, FOLR1 expression is based in 2 publicly microarray datasets available.28 In the box-plots, small open box indicates median mRNA expression scores.
