title: Vitamin D metabolism in rachitic pre-term infants.
mesh_terms: D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000378:metabolism*; D008297:Male; D012279:Rickets / Q000378:metabolism*; D014807:Vitamin D / Q000378:metabolism*
chemical_list: D014807:Vitamin D