Nadeem, F., Khan, M. and Naz, F.U. 2019. Comparison of mean pain scores for the patients with sub hepatic drainage to those without it after elective uncomplicated laparoscopic cholecystectomy: Post operative pain after laparoscopic cholecystectomy. Pakistan Journal of Medical Sciences. 35, 1 (Jan. 2019). DOI:https://doi.org/10.12669/pjms.35.1.224.