Correction to: Selected nasogastric lavage in patients with nonvariceal upper gastrointestinal bleeding

oleh: Eun Jeong Gong, Li-chang Hsing, Hyun Il Seo, Myeongsook Seo, Baek Gyu Jun, Jong Kyu Park, Sang Jin Lee, Koon Hee Han, Young Don Kim, Woo Jin Jeong, Gab Jin Cheon, Min-Ju Kim