Naheed Akhtar, Raja Muhammad Ijaz, Saman Naz, Irum Shahzadi,Talat Shahzad, Nadir Saifullah Khan 2022. Role of local infiltration of tramadol vs. Bupivacain in postoperative laproscopic cholecystectomy pain management. Pakistan Journal of Medical & Health Sciences. 16, 04 (Apr. 2022), 144. DOI:https://doi.org/10.53350/pjmhs22164144.