doi:10.1016/j.gie.2015.03.320Takeda, TsutomuMatsumoto, KenshiTanaka, IppeiNakagawa, YutaIzumi, KentaroMatsumoto, KoheiUeyama, HiroyaShimada, YujiAsaoka, DaisukeHojo, MarikoElsevier Inc.Gastrointestinal Endoscopy