Shah U, Contractor N, Mehta K. Preoperative Pulmonary Function Tests in COPD Patients Posted For Major Upper Abdominal Surgeries: Evaluation of Postoperative Pulmonary Complications: Preoperative Pulmonary Function Tests in COPD Patients Posted For Major Surgeries. Natl J Integr Res Med [Internet]. 2018 Feb. 2 [cited 2024 Nov. 25];8(3):26-9. Available from: https://nicpd.ac.in/ojs-/index.php/njirm/article/view/1239