1. Department of Respiratory Medicine, People’s Hospital of Ningxia Hui Autonomous Region, Yinchuan 750000, Ningxia, China
2. Department of Respiratory Medicine, Third Clinical Medical College, Ningxia Medical University, Yinchuan 750000, Ningxia, China
3. College of Traditional Chinese Medicine, Ningxia Medical University, Yinchuan 750000, Ningxia, China
4. General Hospital of Ningxia Medical University, Yinchuan 750000, Ningxia, China