the Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
Clinical Research Center, Qingdao, Shandong, China
Affiliated Hospital of Qingdao University, Shandong, Qingdao, China
The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China
The Affiliated Hospital of Qingdao University Phase I Clinical Research Center, Qingdao, Shandong, China
Ruiqing Liu, Qingdao, Shan Dong, China
Department of Gastrointestinal Surgery, Qingdao University Affiliated Hospital, Qingdao, Shandong, China