[Prevention of rickets in premature children].
D006801:Humans; D007231:Infant, Newborn; D007235:Infant, Premature, Diseases / Q000517:prevention & control*; D012279:Rickets / Q000517:prevention & control*; D014807:Vitamin D / Q000627:therapeutic use*
D014807:Vitamin D
Profilaktyka rakhitu u nedonoshenykh diteĭ.