1. Department of Respiratory and Critical Care Medicine, Fenyang Hospital of Shanxi Province, Fenyang, China;
2. Department of Respiratory and Critical Care Medicine, the First Affiliated Hospital of Shanxi Medical University, Taiyuan, China;
3. Department of Information, Fenyang Hospital of Shanxi Province, Fenyang, China;
4. Department of Pharmacy, Fenyang Hospital of Shanxi Province, Fenyang, China;
5. Department of Molecular and Cell Genetics Laboratory, Fenyang Hospital of Shanxi Province, Fenyang, China