Ashraf, S., Ashraf, A., Ali, U., Hadi, N. ul, Anwar, R., Zaman, M. and Hafizullah, M. 2016. FREQUENCY OF UNDIAGNOSED ISCHEMIC HEART DISEASE IN PATIENTS ADMITTED WITH ACUTE EXACERBATION OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE. Pakistan Heart Journal. 49, 3 (Nov. 2016). DOI:https://doi.org/10.47144/phj.v49i3.1115.