Farooq, M.U., Saeed, I., Ul Hassan, S., Zaman, S., Shah, M. and Hussain, S. 2023. Role of Low-Dose Theophylline on Functional Improvement in Patients of Moderately Severe Chronic Obstructive Pulmonary Disease. Pakistan Armed Forces Medical Journal. 73, 1 (Mar. 2023), 306-09. DOI:https://doi.org/10.51253/pafmj.v73i1.7254.