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Kaplan-Meier analyses of overall survival in 194 patients with gastroenteropancreatic neuroendocrine tumors. (A) Cyclooxygenase-2: solid line, no overexpression; dotted line, overexpression. (B) Ki-67: solid line, G1; dotted line, G2 or G3. (C) Somatostatin receptor 2: solid line, positive; dotted line, negative.
