1 Department of, Binzhou Medical University, Yantai, 250012, People's Republic of China; Department of Hepatobiliary Surgery, The People's Hospital of Binzhou, Binzhou, 256610, People's Republic of China.
2 Department of Hepatobiliary Surgery, The People's Hospital of Binzhou, Binzhou, 256610, People's Republic of China. Electronic address: doctorxuedong@163.com.
3 Department of Hepatobiliary Surgery, The People's Hospital of Binzhou, Binzhou, 256610, People's Republic of China.