Sidra Riaz, Naveed Ali Khan, Abdul Khalique, Raazia Ramzan, Munira Abdul Aziz (2023) “Validation of a Pre-Existing Scoring System for Preoperative Prediction of Difficulty in Laparoscopic Cholecystectomy”, Pakistan Journal of Medical & Health Sciences, 17(04), p. 405. doi: 10.53350/pjmhs2023174405.