“IMPACT OF PREOPERATIVE COMORBIDITIES ON POSTOPERATIVE MORBIDITY AND MORTALITY IN ADULTS UNDERGOING MAJOR ABDOMINAL SURGERY: A SYSTEMATIC REVIEW AND META-ANALYSIS OF DIABETES MELLITUS, HYPERTENSION, CHRONIC KIDNEY DISEASE, AND OBESITY”, FMHR, vol. 4, no. 3, pp. 748–759, Mar. 2026, Accessed: Nov. 08, 2026. [Online]. Available: https://fmhr.net/index.php/fmhr/article/view/2503