Affiliation: | 1. Department of Orthopedic Surgery, Qilu Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China;2. Department of Orthopedic Surgery, Linyi central hospital, Linyi, Shandong, China;3. Department of Ultrasound, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong, China |