Application of over-the-scope clip for massive duodenal ulcer bleeding in a 4-year-old boy weighing 7.8 kg - Kondo, Takeo; Mori, Hirohito; Kobara, Hideki; Nishiyama, Noriko; Kondo, Sonoko; Okada, Hitoshi; Kusaka, Takashi (Endoscopy, 2018)