Alam, N., Yuwen, X., Xinghua, T., Huanhuan, L., Yun, X., Jiajia, Q., & Uddin, M. J. (2019). Impact of Comorbidities on Chronic Obstructive Pulmonary Disease Patients. Chattagram Maa-O-Shishu Hospital Medical College Journal, 18(1), 8–9. https://doi.org/10.3329/cmoshmcj.v18i1.42126