Department of Respiratory Medicine First Affiliated Hospital of Hainan Medical University Key Laboratory of first Aid and Trauma Research Ministry of Education Haikou Hainan 570102 P.R.China;
Department of Respiratory Medicine First Affiliated Hospital of Hainan Medical University Key Laboratory of first Aid and Trauma Research Ministry of Education Haikou Hainan 570102 P.R.China;
Department of Respiratory Medicine First Affiliated Hospital of Hainan Medical University Key Laboratory of first Aid and Trauma Research Ministry of Education Haikou Hainan 570102 P.R.China;
Department of Respiratory Medicine First Affiliated Hospital of Hainan Medical University Key Laboratory of first Aid and Trauma Research Ministry of Education Haikou Hainan 570102 P.R.China;
Elephantopus scaber Linn; Acute exacerbation of COPD; Airway mucus hypersecretion; NE; MUC5AC;