Al Mamun, Kazi Shamim, Mohammad Ibrahim Chowdhury, Muhammad Khurshed Alam, Syedul Alam Khuryshi, and SM Ifteakharul Islam. 2021. “Echocardiographic Right Heart Study in Patients With Chronic Obstructive Pulmonary Disease”. Medicine Today 33 (2):123-28. https://doi.org/10.3329/medtoday.v33i2.56057.