1. Medicine Research Center Binzhou Medical University Yantai China
2. Department of Respiratory Medicine Affiliated Hospital to Binzhou Medical University Binzhou China
3. Department of Pathology Affiliated Hospital to Binzhou Medical University Yantai China
4. Department of Respiratory Medicine Affiliated Hospital to Binzhou Medical University Yantai China
5. Clinical Laboratory Affiliated Hospital to Binzhou Medical University Yantai China