[Prevention of rachitis].
D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D012279:Rickets / Q000517:prevention & control*; D014467:Ultraviolet Therapy; D014807:Vitamin D / Q000008:administration & dosage*
D014807:Vitamin D
A rachitis prophylaxis