Alrefaee J, McMillan D, Carter R, Nally J. The Relationship between Cardiopulmonary Exercise testing (CPET), other Related Factors and Outcomes in Patients Undergoing Major Upper Gastrointestinal Surgery. Ann. coll. Med. Mosul [Internet]. 2019 Jun. 1 [cited 2025 Sep. 9];41(1):1-10. Available from: https://ojs.uomosul.edu.iq/index.php/mmed/article/view/37182