1. College of Laboratory Medicine, Dalian Medical University, Dalian 116044, Liaoning Province, China
2. Department of Laparoscopic Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China
3. Department of Oncology, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, Liaoning Province, China
4. Department of Medical Biology, Faculty of Health Sciences, University of Tromsø, Tromsø, Norway
5. Department of Biochemistry, Dalian Medical University, Dalian 116044, Liaoning Province, China
6. Department of Microbiology, Dalian Medical University, Dalian 116044, Liaoning Province, China