1. The Central Laboratory, Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College Qingdao University, Yantai, Shandong, People’s Republic of China
2. The First Clinical College of Dalian Medical University, Dalian, Liaoning, People’s Republic of China
3. Department of Gastrointestinal Surgery, Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College Qingdao University, Yantai, Shandong, People’s Republic of China
4. Department of Oncology, Yantai Yuhuangding Hospital, Affiliated Hospital of Medical College Qingdao University, Yantai, Shandong, People’s Republic of China