1 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan. Electronic address: yuicnakashima@gmail.com.
2 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan; Department of General Surgical Science, Graduate School of Medicine, Gunma University, Maebashi, Japan.
3 Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.