04 September 2020>: Clinical Research
Clinical Characteristics and Outcomes of Patients with Severe COVID-19 and Chronic Obstructive Pulmonary Disease (COPD)
Yuanzhou He BCG , Min Xie DE , Jianping Zhao CF , Xiansheng Liu A*DOI: 10.12659/MSM.927212
Med Sci Monit 2020; 26:e927212
Figure 1 Kaplan-Meier survival curves comparing patients with severe COVID-19 with and without COPD (** P<0.01).