title: 25(OH) vitamin D3 and early neonatal hypocalcemia in preterm infants.
mesh_terms: D002112:Calcifediol / Q000627:therapeutic use*; D002118:Calcium / Q000097:blood; D006801:Humans; D006996:Hypocalcemia / Q000097:blood / Q000188:drug therapy*; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000188:drug therapy*
chemical_list: D002112:Calcifediol; D002118:Calcium