1. Medicine and Pharmacy Research Center, Binzhou Medical University, Yantai, Shandong Province, 264003 China
2. Department of Radiology, Affiliated Hospital of Binzhou Medical University, Binzhou, Shandong Province, 256603 China
3. Department of Gastric and Intestine, Yantai Affiliated Hospital of Binzhou Medical University, Yantai, Shandong Province, 264003 China
4. Yantai Institute, China Agriculture University, Yantai, Shandong Province, 264670 China
5. Department of Chemistry - BMC, Uppsala University, Uppsala, 75124, Sweden