Post-Operative Pulmonary Function : A Comparison between Upper Abdominal Open Cholecystectomy and Laparoscopic Cholecystectomy. j Bangladesh Soc Anaesthesiologists [Internet]. 2014 Feb. 27 [cited 2026 Jun. 29];17(1):12-6. Available from: https://banglajol.info/index.php/JBSA/article/view/4045