Yasin, M., Uzair Noor, Sanaullah Tareen, Nasir Mahmood, Faheem Jan and Mazhar Ali Khan 2021. Depression in Patients with Chronic Obstructive Pulmonary Disease at Tertiary Care Hospital of Khyber Pakhtunkhwa. Pakistan Journal of Chest Medicine. 27, 1 (Aug. 2021), 08–13.