1. Department of Respiratory and Critical Care Medicine, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian 116033, China
2. Department of Anesthesiology Medicine, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian 116033, China
3. Department of Pathology Medicine, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian 116033, China