1. Department of Pediatric Surgery, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, Shandong, China
2. Institute of Digital Medicine and Computer-Assisted Surgery, Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
3. Department of Thyroid Surgery, Affiliated Qingdao Central Hospital, Qingdao University, Qingdao, Shandong, China