IJSR International Journal of Scientific Research 2277 - 8179 Indian Society for Health and Advanced Research ijsr-12-4-48399 Original Research Paper A Study To Assess Serum C-Reactive Protein And Pulmonary Arterial Systolic Pressure Changes By Echocardiography In Stable Chronic Obstructive Pulmonary Disease Patients Haldar Dr. Sourindra Nath Banerjee Dr. April 2023 12 4 01 02