MUHAMMAD IRFAN, AQEEL AHMED, ABDUL RASHEED QURESHI,AFZAAL ULLAH KHAN. 2018. “Diagnostic Dilemma in the Routine Diagnosis of Non-Resolving Pneumonia in Elderly Patients: A Cross-Sectional Study”. Journal of Fatima Jinnah Medical University 11 (1). https://www.jfjmu.com/index.php/ojs/article/view/27.