1. Department of Emergency, People's Hospital of Ningxia Hui Autonomous Region (The First Affiliated Hospital of Northwest Minzu University), Ningxia, China.
2. Medical College of Northwest Minzu University, Lanzhou, China.
3. People's Hospital of Guangxi Zhuang Autonomous Region, Guangxi, China.
4. Department of Geratology, Lanzhou University, Lanzhou, China.
5. Department of Geratology, Gansu Second Provincial Hospital, Lanzhou, China.
6. Xi'An International University, Xi'An, China.