Clinical Trials for the Prevention of Gallstone Formation After Gastrectomy in Patient With Gastric Cancer

Inclusion Criteria: * Male or female at least 19 years of age * Patient who undergoes gastrectomy (total, distal or proximal gastrectomy) * D1+ or D2 lymph node dissection * Performance status of 0 or 1 on ECOG (Eastern Cooperative Oncology Group) scale * Written informed consent Exclusion Criteria: * Patients with cholangitis, cholecystitis, non-functional gall bladder, or biliary obstruction * Presence of gallstones on ultrasonography and/or CT * History of previous cholecystectomy * Patients undergoing pylorus-preserving gastrectomy * Pregnant or lactating women and fertile women who is not using proper contraceptive method * Patients with history of drug or alcohol abuse within 5 years ago