Namra Shakoor, Sumera Naz, Muhammad Mudasser Khan (2022) “Comparison of Hasson (Open) and Veress Needle (Closed) Technique of Creating Pneumoperitonium in Laparoscopic Cholecystectomy”, Pakistan Journal of Medical & Health Sciences, 16(05), p. 1093. doi: 10.53350/pjmhs221651093.