Skeletal changes in preterm infants.
D000818:Animals; D001847:Bone Diseases / Q000209:etiology; D002112:Calcifediol / Q000097:blood*; D006801:Humans; D007223:Infant; D008892:Milk / Q000009:adverse effects*; D010281:Parathyroid Hormone / Q000097:blood*
D010281:Parathyroid Hormone; D002112:Calcifediol