1. The First Hospital of Lanzhou University, Lanzhou, People’s Republic of China;
2. Institute of Emergency Management and Reconstruction in Post-Disaster, Sichuan University, Chengdu, People’s Republic of China;
3. West China Second University Hospital, Sichuan University, Chengdu, China;
4. Department of Spine Surgery, The 940 Hospital of Joint Logistics Support Force of Chinese People’s Liberation Army, Lanzhou, People’s Republic of China;
5. West China Hospital/West China School of Nursing, Sichuan University, Chengd, China