Department of Intervention Medicine;
the Second Hospital of Shandong University;
Jinan 250033;
Shandong Province;
China;
Interventional Oncology Institute;
Shandong University;
Jinan 250033;
Shandong Province;
China;
Department of Radiology;
Jiyang People’s Hospital;
Jinan 251400;
Shandong Province;
China;
Common; bile; duct; stones; Gallstones; Percutaneous; transhepatic; removal; Ursodeoxycholic; acid;