1. Department of Laparoscopic Surgery, the First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
2. Department of Ultrasound, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China
3. Department of Vascular Interventional, Affiliated Hongqi Hospital of Mudanjiang Medical College, Mudanjiang, China
4. Department of Nursing, The First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning Province, China