title: [Methods of determining gastrointestinal blood loss in digestive system diseases].
mesh_terms: D000328:Adult; D004066:Digestive System Diseases / Q000150:complications / Q000175:diagnosis*; D006471:Gastrointestinal Hemorrhage / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D008297:Male; D008722:Methods; D008875:Middle Aged
vernacular_title: Metody opredeleniia krovopoter' iz zheludochno-kishechnogo trakta pri zabolevaniiakh organov pishchevareniia.