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20× pictures of immunohistochemical IGF‐1R staining showing: A – no staining at all or membrane staining in <10% of the tumor cells (0). B – faint/barely perceptible partial membrane staining in >10% of the tumor cells (1+). C – weak to moderate complete membrane staining in >10% of the tumor cells (2+). D – strong to complete membrane staining in >10% of the tumor cells (3+).
