Department;
of;
Hepatobiliology,;
The;
Second;
Affiliated;
Hospital;
of;
Shantou;
University,;
Shantou;
515041,;
China;
Department;
of;
Gastroenterology,;
The;
Affiliated;
Hospital;
of;
Jiangsu;
University,;
Zhenjiang;
212001,;
China;