1. Department of Pediatric Surgery, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
2. Department of Pediatric Surgery, Yijishan Hospital of Wannan Medical College, Wannan Medical College, Wuhu, China
3. Shandong Key Laboratory of Digital Medicine and Computer Assisted Surgery, Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China