Department of Gastroenterology;
the Gansu Provincial Cancer Hospital;
Lanzhou 730050;
Gansu Province;
China.;
School of Life Science;
Lanzhou University;
Lanzhou 730000;
Gansu Province;
China.;
College of Life Science and Technology;
Gansu Agriculture University;
Lanzhou 730070;
Gansu Province;
China;
Department of Pathology;
the Gansu Provincial Cancer Hospital;
Lanzhou 730050;
Gansu Province. China.;