[Rickets prevention in premature children].
D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007234:Infant, Premature; D012279:Rickets / Q000517:prevention & control*; D014807:Vitamin D / Q000627:therapeutic use
D014807:Vitamin D
Profilaktika rakhita u nedonoshennykh deteĭ.