Clinical Research Directory

Inclusion Criteria: * diagnosed as common bile duct stone by image modality examination * agreement for this study enrollment Exclusion Criteria: * no definite common bile duct stone by image modality examination * symptomatic patients who complain with fever/abdominal pain that compatible with common bile duct stone related symptom * previously diagnosed as pancreatobiliary malignancy * previously treated by endoscopic or percutaneous treatment for bile duct stones * severe cardio or pulmonary disease * pregnancy or possibility of pregnancy * who do not agree with study enrollment