1. Department of Anesthesiology, The Third People's Hospital of Chengdu Southwest Jiao Tong University Chengdu China
2. Center of Cardiac Surgery, Sichuan Academy of Medical Sciences & Sichuan Provincial People's Hospital Chengdu China
3. Department of Orthopaedics, The Third People's Hospital of Chengdu Southwest Jiao Tong University Chengdu China