Ashraf, Shahzad, Imtiaz Ahmed Khan, and Waheed ur Rehman Khan. “Echocardiography As a Screening Modality for Portopulmonary Hypertension in Patients With Cirrhosis and Chronic Viral Hepatitis”. Pakistan Armed Forces Medical Journal 73, no. 5 (October 30, 2023): 1279–1283. Accessed November 9, 2024. https://pafmj.org/PAFMJ/article/view/6395.