alkhayat, khaled fawzy and esmael, hend mohamed (2019) “Clinical Presentation and co- Morbidity of COPD Patients”, International Journal of Medical Science in Clinical Research and Review, 2(03), pp. 74–80. Available at: http://ijmscrr.in/index.php/ijmscrr/article/view/39 (Accessed: 22 December 2024).