1. Department of Research and Development for Innovative Medical Devices and Systems, Shiga University of Medical Science, Seta Tsukinowa-cho, Otsu, Japan;
2. Department of Surgery, University of Medicine and Pharmacy at Ho Chi Minh City, Hong Bang Street, Ho Chi Minh City, Vietnam;
3. Department of Surgery, Shiga University of Medical Science, Shiga, Japan;
4. Department of Surgery, Hino Memorial Hospital, Shiga, Japan