1. Department of Anesthesiology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, People’s Republic of China
2. Department of Orthopaedics, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, People’s Republic of China
3. Department of Orthopaedics, The Eighth Affiliated Hospital, Sun Yat-sen University, Shenzhen, People’s Republic of China