1. Department of Gastro-pancreatic Surgery, The Fifth Clinical Medical College of Shanxi Medical University and Shanxi Provincial People's Hospital, Taiyuan, Shanxi 030012, China.
2. Department of Gastrointestinal Surgery and Institute of Digestive Surgery, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
3. Department of Bioinformatics and Computational Biology, School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, China.
4. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China.
5. School of Medicine, Institute of Medical Sciences, Örebro University, SE-Örebro SE-701 82, Sweden.
6. Department of Oncology, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping SE-581 83, Sweden.