title: Osteopenia in very low birthweight infants.
mesh_terms: D001851:Bone Diseases, Metabolic / Q000209:etiology*; D004200:Diseases in Twins; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000209:etiology*