1. Department of Respiratory and Critical Care Medicine, The First College of Clinical Medicine Science, China Three Gorges University, Yichang 443003, China
2. Department of Respiratory and Critical Care Medicine, Yichang Central People’s Hospital at Zhijiang, Zhijiang 443003, China
3. Department of Respiratory and Critical Care Medicine, Yichang Central People’s Hospital, Yichang 443003, China
4. Department of Respiratory and Critical Care Medicine, Renmin Hospital of Wuhan University, Wuhan, China