[1
]
Endoscopy Division, National Cancer Center Hospital, Tokyo, Japan.
[2
]
Cancer Screening Center, National Cancer Center Hospital, Tokyo, Japan.
[3
]
Department of Gastroenterology, Nippon Medical School, Graduate School of Medicine,
Tokyo, Japan.
[4
]
Division of Research and Development for Minimally Invasive Treatment, Cancer Center,
Keio University, Tokyo, Japan.