Controlled trial in dental and medical insurance.
D003729:Dental Care / Q000191:economics; D003752:Dental Health Services / Q000706:statistics & numerical data; D005102:Health Expenditures; D006301:Health Services Needs and Demand; D006801:Humans; D007347:Insurance, Dental; D007348:Insurance, Health; D008137:Longitudinal Studies; D009909:Oral Health