1)Schiff L, et al:Observations on the oral administration of citrated blood in man. Am J Med Sci 203:409-412, 1942
2)Srygley FD, et al:Does this patient have a severe upper gastrointestinal bleed? JAMA 307:1072-1079, 2012
3)Mogilevski T, et al:Endoscopic investigation in non-iron deficiency anemia;A cost to the health system without patient benefit. Endosc Int Open 4:E198-E201, 2016
4)Mathews BK, et al:Fecal occult blood testing in hospitalized patients with upper gastrointestinal bleeding. J Hosp Med 12:567-569, 2017
5)Ip S, et al:Use of fecal occult blood testing in hospitalized patients;Results of an audit. Can J Gastroenterol Hepatol 28:489-494, 2014
6)Kobayashi K, et al:Impact of fecal occult blood on obscure gastrointestinal bleeding;Observational study. World J Gastroenterol 21:326-332, 2015
7)Blatchford O, et al:A risk score to predict need for treatment for uppergastrointestinal haemorrhage. Lancet 356:1318-1321, 2000
8)藤城光弘,他:非静脈瘤性上部消化管出血における内視鏡診療ガイドライン.Gastroenterol Endosc 57:1648-1666, 2015