It was proposed that a diagnostic algorithm based on available clinical and endoscopic regression equation could improve the current sensitivity, specificity, and accuracy in differentiating between CD from ITB.

In this paper we introduce the notion of weakly (s, r)-contractive multi-valued operator on b-metric space and establish some fixed point theorems for this operator. In addition, an application to the differential equation is given to illustrate usability of obtained results.Keywords: b-metric space, weakly (s, r)-contractive multi-valued operator, fixed point theorem.

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