Pyogenic granuloma in the small intestine: a rare cause of obscure gastrointestinal bleeding - Katsurahara, Masaki; Kitade, Takashi; Tano, Shunsuke; Hamada, Yasuhiko; Inoue, Hiroyuki; Tanaka, Kyosuke; Horiki, Noriyuki (Endoscopy, 2015)