1. Department of Pain Management, The First Affiliated Hospital of Jinan University, Guangzhou, Guangdong Province, China;
2. Department of Anesthesology, Affiliated Foshan Hospital of the Southern Medical University and The Second People's Hospital of Foshan City, Foshan, Guangdong Province, China;
3. Department of Orthopaedics, Affiliated Foshan Hospital of the Southern Medical University and The Second Peoplès Hospital of Foshan City, Foshan, Guangdong Province, China