1 Department of Pediatric Surgery, The Northwest Women's and Children's Hospital, Xi'an, Shanxi Province, China.
2 Department of Pediatric Surgery, The Northwest Women's and Children's Hospital, Xi'an, Shanxi Province, China. Electronic address: liushiqi23@foxmail.com.
3 Third Department of General Surgery, The First Affiliated Hospital, School of Medicine, Shihezi University, Shi He Zi, Xinjiang Province, China.
4 Northwest Institute for Nonferrous Metal Research (NIN), Xi'an, Shanxi Province, China.