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Kaplan-Meier analysis of overall survival and COX-2 staining in the cancer stromal cells. COX-2 expression was detected with the Ab1 (a), Ab2 (b) and Ab3 (c) antibodies and evaluated using the algorithms ALG1 (upper row), ALG2 (middle row) and ALG3 (lower row). 0 – low expression; 1 – high expression.
