Department of Hepatobiliary Surgery;
First Affiliated Hospital of Xi’an Jiaotong University;
Xi’an;
Shaanxi 710061;
ChinaDepartment of Hepatobiliary Surgery;
ChinaDepartment of General Surgery;
First Affiliated Hospital of Xinjiang Medical University;
Urumqi;
Xin;
Gallbladder carcinoma; Epidemiology; Incidence; Risk factor; Northwestern China;