1 Department of Gastroenterological and Transplant Surgery, Applied Life Sciences, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.
2 Department of Surgery, Kure Medical Center, National Hospital Organization, 3-1 Aoyama, Kure, Hiroshima, 737-0023, Japan. [email protected].
3 Advanced Medical Skills Training Center, Institute of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.