1. Department of Pulmonary and Critical Care Medicine, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, Fujian, People's Republic of China
2. The School of Clinical Medicine, Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
3. School of Medicine, Xiamen University, Xiamen, Fujian, People’s Republic of China