1. Department of Surgery, Universitätsklinikum Erlangen, Friedrich-Alexander Universität Erlangen-Nürnberg (FAU), 91054 Erlangen, Germany
2. Second Department of General Surgery, Shaanxi Provincial People’s Hospital, Xi’an 710068, China
3. Second Department of General Surgery, Third Affiliated Hospital of Xi’an Jiaotong University, Xi’an 710068, China
4. Institute of Medical Research, Northwestern Polytechnical University, Xi’an 710072, China