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What are The Sensitivity, Specificity, and Positive Predictive Value of Ultrasound for Diagnosing Acute Appendicitis in Pediatric Patients? : A Systematic Review. the. Indonesian. j. gen. med. [Internet]. 2026 Jun. 8 [cited 2026 Oct. 21];41(1):192-251. Available from: https://indonesianjournalmedicine.org/index.php/ijgm/article/view/387