title: The measurement of gastrointestinal blood loss using radio-active chromium.
mesh_terms: D002857:Chromium; D002860:Chromium Radioisotopes; D004912:Erythrocytes; D006471:Gastrointestinal Hemorrhage; D041981:Gastrointestinal Tract; D006470:Hemorrhage; D006801:Humans; D011851:Radioactivity
chemical_list: D002860:Chromium Radioisotopes; D002857:Chromium
keywords: CHROMIUM/radioactive; ERYTHROCYTES; GASTROINTESTINAL SYSTEM/hemorrhage