Hassaan, M., Ajmal, M., Butt, N.I., Aftab, S., Ashfaq, F. and Tareen, M.Q. 2022. FREQUENCY OF PULMONARY HYPERTENSION USING ECHOCARDIOGRAPHY IN PATIENTS OF IDIOPATHIC PULMONARY FIBROSIS AT A TERTIARY CARE HOSPITAL. Journal of Postgraduate Medical Institute. 36, 2 (Jun. 2022), 121–4. DOI:https://doi.org/10.54079/jpmi.36.2.2980.