title: Ultrastructural mechanisms of impaired erythropoiesis in certain gastrointestinal diseases.
mesh_terms: D000740:Anemia / Q000209:etiology; D000818:Animals; D001853:Bone Marrow / Q000473:pathology; D004920:Erythropoiesis; D005767:Gastrointestinal Diseases / Q000097:blood / Q000150:complications / Q000473:pathology*; D006801:Humans; D051381:Rats