1) Surgical Oncology, Hokkaido University Graduate School of Medicine, Tokyo, Japan
2) Neurosurgery, Keio University Graduate School of Medicine, Tokyo, Japan
3) Division of Development of Advanced Treatment, Center for Development of Advanced Medical Technology, Jichi Medical University School of Medicine, Tokyo, Japan
4) Department of Anatomy and Life Structure, Juntendo University Graduate School of Medicine, Tokyo, Japan
5) Department of Gastroenterology, Kobe University Graduate School of Medicine, Tokyo, Japan
6) Emergency Medicine, Jichi Medical University School of Medicine, Tokyo, Japan
7) Division of Medical Skill Training, Center for Development of Advanced Medical Technology, Jichi Medical University School of Medicine, Tokyo, Japan
8) University of Tokyo Graduate Schools for Law and Politics, Tokyo, Japan

Toshiaki Shichinohe¹⁾, Satoshi Kondo¹⁾, Takeshi Kawase²⁾, Eiji Kobayashi³⁾, Tatsuo Sakai⁴⁾, Maki Sugimoto⁵⁾, Yoshimitsu Izawa⁶⁾, Shuji Hishikawa⁷⁾, Norio Higuchi⁸⁾