“COMPARISON OF THE EFFECTS OF INTRATHECAL TRAMADOL AS AN ADJUVANT WITH BUPIVACAINE IN PATIENTS UNDERGOING INFRA-UMBILICAL SURGERIES AT TERTIARY CARE HOSPITAL, KARACHI”, RMSR, vol. 3, no. 7, pp. 110–116, Jul. 2025, Accessed: Jul. 17, 2025. [Online]. Available: http://www.thermsr.com/index.php/Journal/article/view/1442