title: Vitamin A level in patients with chronic periodontal disease. Preliminary notice.
mesh_terms: D000328:Adult; D002908:Chronic Disease; D005260:Female; D006801:Humans; D010512:Periodontal Index; D010518:Periodontitis / Q000097:blood* / Q000188:drug therapy; D014801:Vitamin A / Q000097:blood*; D014810:Vitamin E / Q000627:therapeutic use
chemical_list: D014801:Vitamin A; D014810:Vitamin E