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In patients with non-small cell lung cancer (NSCLC), tumor expression of P21-Ras, HER2, P53, and Bcl-2 has been reported as independent predictors of prognosis. However, the prognostic information carried by these proteins has usually been determined separately, and their potential interaction has not been taken into account. We conducted immunostaining for P21-Ras, HER2, P53 and Bcl-2 on 238 cases...
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