Hypovitaminosis A as a public health problem.
D000293:Adolescent; D000328:Adult; D001208:Asia; D001766:Blindness / Q000209:etiology; D002338:Carotenoids / Q000627:therapeutic use; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D011634:Public Health; D014801:Vitamin A / Q000627:therapeutic use; D014802:Vitamin A Deficiency / Q000150:complications / Q000453:epidemiology / Q000517:prevention & control; D014985:Xerophthalmia / Q000209:etiology / Q000517:prevention & control
D014801:Vitamin A; D002338:Carotenoids