title: An advance in identification and localization of gastrointestinal hemorrhage.
mesh_terms: D004912:Erythrocytes; D006471:Gastrointestinal Hemorrhage / Q000000981:diagnostic imaging*; D006801:Humans; D011877:Radionuclide Imaging; D013667:Technetium; D013997:Time Factors
chemical_list: D013667:Technetium