Affiliation: | 1. Department of Gynaecology and Obstetrics, The First Affiliated Hospital of Dalian Medical University, Dalian, China;2. Department of Anesthesiology, The First Affiliated Hospital of Dalian Medical University, Dalian, China;3. Department of Hepatobiliary Surgery, The First Affiliated Hospital of Dalian Medical University, Dalian 116011, China;4. Department of Gastrointestinal Endoscopy, The First Affiliated Hospital of Dalian Medical University, Dalian, China;5. Department of Ultrasound, The First Affiliated Hospital of Dalian Medical University, Dalian, China;6. Department of Hepatobiliary Surgery, Dalian Municipal Central Hospital Affiliated of Dalian Medical University, Dalian, China |