Waseem, Hafiz Muhammad, Rida Ajmal Khan, and Khalid Parvez Lone. “PLASMA SURFACTANT PROTEIN-A LEVELS IN HEALTHY SUBJECTS AND CHRONIC OBSTRUCTIVE PULMONARY DISEASE PATIENTS”. Journal of Ayub Medical College Abbottabad 32, no. 1 (January 28, 2020): 3–8. Accessed April 19, 2025. https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/6183.