1. Department of Orthopedics, Linyi Central Hospital, Linyi, Shandong 276000, China
2. Department of Thyroid Surgery, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China
3. Department of PET-CT, The Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China
4. Department of General Surgery, the Affiliated Hospital of Qingdao University, Qingdao, Shandong 266003, China