1. Department of Hand Foot Surgery, Affiliated Hospital of Chengde Medical College, Chengde, China
2. Department of Critical Care, Affiliated Hospital of Chengde Medical College, Chengde, China
3. Department of Orthopedic Trauma, Affiliated Hospital of Chengde Medical College, Chengde, China
4. Department of Anesthesiology, Affiliated Hospital of Chengde Medical College, Chengde, China