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