Naeem, M., Aziz, M., Saeed, B., Hashmi, S. D., Ali, M., & Jalil, M. (2025). Using Pre-Operative Incentive Spirometer Reduces Chances of Basal Atelectasis in Patients Undergoing Upper Abdominal Surgeries - A Randomized Controlled Trial. Pakistan Armed Forces Medical Journal, 75(SUPPL-2), S164-S168. https://doi.org/10.51253/pafmj.v75iSUPPL-2.11141