title: Hepatitis B surface antigen (HBsAg) and dental practice in Oregon.
mesh_terms: D003729:Dental Care / Q000379:methods; D003815:Dentists; D006509:Hepatitis B / Q000517:prevention & control / Q000635:transmission*; D006801:Humans; D009784:Occupational Diseases / Q000517:prevention & control / Q000635:transmission*; D009922:Oregon