Hiroyuki Isayama
Department of Gastroenterology,
Graduate School of Medicine, Juntendo University Tokyo, Japan.
h-isayama@juntendo.ac.jp
Yousuke Nakai
Department of Endoscopy and Endoscopic Surgery,
Graduate School of Medicine, The University of Tokyo,
Tokyo, Japan
ynakai-tky@umin.ac.jp
Takashi Sasaki
Department of Hepato-Biliary-Pancreatic Medicine,
Cancer Institute Hospital of Japanese Foundation for Cancer Research,
Tokyo, Japan
sasakit-tky@umin.ac.jp