Letter: Vietnamese children.
D001361:Avitaminosis; D002662:Child Health Services; D002675:Child, Preschool; D003466:Cultural Characteristics; D004032:Diet; D005247:Feeding Behavior; D006801:Humans; D007114:Immunization; D014481:United States; D014744:Vietnam / Q000208:ethnology; D014802:Vitamin A Deficiency / Q000175:diagnosis