Yaqub, Umairah, Sadaf Zohra, Syed Mukarram Hussain, Ambreen Ehsan, Ayesha Imran, and Sohail Ilyas. 2020. “CONVERSION OF LAPAROSCOPIC CHOLECYSTECTOMY TO OPEN CHOLECYSTECTOMY: PREOPERATIVE RISK FACTORS AND INTRAOPERATIVE REASONS”. Pakistan Armed Forces Medical Journal 70 (5):1288-93. https://pafmj.org/PAFMJ/article/view/5551.