1. Yantai Yuhuangding Hospital Affiliated to Qingdao Medical University, Yantai, China
2. The First People’s Hospital of Yinchuan, Yinchuan, China
3. Jingbian People’s Hospital, Yulin, China
4. Xi’An International Medical Centre, Xi’An, China
5. Zhangye People’s Hospital Affiliated to Hexi University, Zhangye, China