1. School of Nursing Internal Medicine Department, Ningxia Medical University, Yinchuan, Ningxia, China
2. Oncology Surgery, General Hospital of Ningxia Medical University, Yinchuan, Ningxia, China
3. School of Nursing Laboratory Center, Ningxia Medical University, Yinchuan, Ningxia, China
4. Department of dermatology, Air Force Characteristic Medical Center, Beijing, China