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. 2021 Jun 7;13(6):e15500. doi: 10.7759/cureus.15500

Figure 4. Correlation between COX-2 expression score and Ki-67 (A) or TNFα serum levels (B) in the control and UDCA (panels C and D, respectively) groups.

Figure 4

The correlation coefficient r is expressed with values between −1 and 1.