1. Department of Gastroenterology, The First Affiliated Hospital of Xi’an Jiaotong University, No. 277, West Yanta Road, Yanta District, Xi’an, Shaanxi 710061, P. R. China
2. National Local Joint Engineering Research Center for Precision Surgery and Regenerative Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, No. 277, West Yanta Road, Yanta District, Xi’an, Shaanxi 710061, P. R. China
3. Xi’an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, 127 West Youyi Road, Beilin District, Xi’an, Shaanxi 710072, P. R. China
4. Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, United States
5. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi’an Jiaotong University, No. 277, West Yanta Road, Yanta District, Xi’an 710061, P. R. China
6. Key Laboratory of Biorheological Science and Technology, Ministry of Education College of Bioengineering, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing 400044, P.R. China