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HIF2A in breast carcinoma. Note the progressive (0, 1+, 2+, and 3+) expression in invasive carcinoma. The quick score (QS) was calculated as the product of the staining intensity and the percentage of positive cells (QS = I×P). (a) Negative expression (200×); (b) weak positive (1+) expression (200×); (c) moderate positive (2+) expression (200×); (d) strong positive expression (200×).
