Fahad Usman, Tahir Mukhtar Sayed, Asim Maqsood, Fozia Shamshad, Tayyaba Anis Chaudhry and Aysha Mushtaq 2022. Investigation of the Clinical Characteristics of Empyema Thoracis Patients at Tertiary Care Facility. Pakistan Journal of Chest Medicine. 28, 4 (Dec. 2022), 478–483. DOI:https://doi.org/10.1996/pjcm.v28i4.805.