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Top panel shows hematoxylin-eosin stain of the tumor in (A), negative isotopic control in (B), and PD-L1 staining in (C). Intermediate PD-L1 staining in a different tumor is shown in (D). The FISH images show MET amplification (red probe) in one tumor in (E) and no amplification in a different tumor in (F) The green signal represents chromosome 7 centromere.
