Hideyuki Chiba Department of Gastroenterology, Omori Red Cross Hospital, Tokyo, Japan	Mitsuru Esaki Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan	Toshio Fujisawa Department of Gastroenterology, Graduate School of Medicine, Juntendo University, Tokyo, Japan	Kazuo Hara Department of Gastroenterology, Aichi Cancer Center, Aichi, Japan
Takuto Hikichi Department of Endoscopy, Fukushima Medical University Hospital, Fukushima, Japan	Yusuke Horiuchi Deparment of Gastroenterology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo, Japan	Tadahisa Inoue Department of Gastroenterology, Aichi Medical University, Aichi, Japan	Takuji Iwashita First Department of Internal Medicine, Gifu University Hospital, Gifu, Japan