Ayaz, M. A.; Butt, M. Q.; Mehmood, K.; Ayaz, M. M.; Abbas, M.; Butt, Z. Q. Reduction of Early Postoperative Pain: Comparison Between Port Site and Intra-Peritoneal Infiltration of Local Anaesthetic Agent Among the Patients Undergoing Elective Cholecystectomy. Pak Armed Forces Med J 2023, 73, 973-976.