Occult blood loss in iron deficiency anemia of infancy.
D000740:Anemia; D000747:Anemia, Hypochromic; D018798:Anemia, Iron-Deficiency; D002648:Child; D006471:Gastrointestinal Hemorrhage; D006470:Hemorrhage; D006801:Humans; D007223:Infant; D009780:Occult Blood
ANEMIA, HYPOCHROMIC/in infancy and childhood; HEMORRHAGE, GASTROINTESTINAL/in infancy and childhood