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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 (Jun. 2023), 405. DOI:https://doi.org/10.53350/pjmhs2023174405.